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Doepfer A-100 Basic System 3 Full Analogue Modular System (LC6v case with PSU)
Cat: 982339 • View all Synthesisers
 
Full analogue modular system
Notes: The new basic system 3 from Doepfer is a return to Dieter Doepfer's original vision of analogue modular synthesis. Modules can be connected via front panel audio and CV connectors and used in infinite combinations. The Basic System 3 is an easily accessible and well-structured system that can be used by enthusiasts and beginners alike. It can be used as a base for exploring sound synthesis and electronic sounds, or as a supplement to delve deeper into different types of synthesis. For example, it is possible to create 4-part paraphonic patches or create complex sounds using the ring modulator. Percussion and drum sounds can also be created in a variety of ways alongside the classic synth sounds. The system's two filters can also be set to self-resonance to provide additional sound sources. The Waveshaper can be used to modify simple sounds and change their overall timbre. As each user's personal requirements are different, blank panels are installed that can be replaced with modules. This means there is no need to buy a new cabinet.

The following modules are included in the basic system 3:

1x A-108 6/12/24/48dB Low Pass Filter
2x A-110-1 Standard VCO
1x A-118 Noise / Random
1x A-121-2 Multimode Filter
1x A-131 VCA exponential
1x A-132-3 Dual linear/exponential VCA
1x A-137-1 Wave Multiplier I
1x A-138j Inverting/Interrupting Mixer (Janus Mixer)
1x A-138b Mixer logarithm.
1x A-138s Mini Stereo Mixer
1x A-140 ADSR Envelope Generator
1x A-140-2 Dual Mini-ADSR
1x A-147-4 Dual VCLFO
1x A-151 Quad Sequential Switch
1x A-160-2 Clock Divider II
1x A-171-2 VC Slew Processor / Generator
2x A-180-2 Multiples 1
1x A-184-1 Ring Modulator/S+H/T+H/Slew Limiter
5x Blind Panel 4HP

The following Patch cables are included:

5x A-100C15 Cable 15cm yellow
10x A-100C30 Cable 30cm black
15x A-100C50 Cable 50cm grey
5x A-100C80 Cable 80cm red
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Pre-orders at Juno

This product is available for pre-order at Juno, for shipping on the release date. You won’t be charged until the order is despatched.

We'll keep you informed of your order at every stage, and let you know if the release date changes.

If the price of the item drops before it's released, you will pay the lower price, but if it increases, you'll only pay the price you see today.

If you also include in-stock items on your order, they’ll be charged and shipped within 24 hours as usual.
coming soon $2,691.64
(No payment required now - pay when released)
Doepfer A-100B1 Blank Panel 1TE (silver)
Cat: 755421 Rel: 14 Nov 19 • View all Synth Module Accessories
 
Robust, blank front panel for use with modular racks & other applications - 1HP wide
Notes: Blank panel, 1HP, constructed from anodised aluminium, silver.
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out of stock $3.42
Doepfer A-160-2 Clock/Trigger Divider II Module (silver)
Doepfer A-160-2 Clock/Trigger Divider II Module (silver) (clock modulator/frequency divider synth module)
Cat: 671576 Rel: 29 Nov 17 • View all Synth modules
 
Enhanced clock divider with multiple dividing factors - 4HP
Notes: Module A-160-2 is an enhanced version of the standard clock divider A-160. The module is a frequency divider for clock/trigger/gate signals, designed to be a source of lower frequencies, particularly for rhythm uses. The Clock input will take any digital signal from, eg. LFO, MIDI sync, or the gate from a MIDI-CV interface. At the outputs, you have access to three sets of seven different sub-divided clock signals, from half the clock frequency down to 1/128. The low/high levels of the output signals are 0V and about +10V.

The A-160-2 also has a reset input. Whenever a reset signal is sensed, all outputs are set to certain levels which depend upon the selected mode.

These are the most important features of the module:

Three different sets of dividing factors, selected by a three-position switch at the front panel:
- Power of two: 2, 4, 8, 16, 32, 64, 128
- Prime numbers: 2, 3, 5, 7, 11, 13, 17
- Integer: 2, 3, 4, 5, 6, 7, 8

Two output modes, selected by a two-position switch at the front panel:
- Gate mode: outputs act like the outputs of typical binary dividers
- Trigger mode: in this mode the outputs are AND-wired with the clock signal (i.e. the clock pulsewidth affects the pulsewidth of the outputs)
- Clock edge type selected by a jumper on the pc board:
- Positive: the rising edge of the clock signal triggers the state change of the outputs
- Negative: the falling edge of the clock signal triggers the state change of the outputs

Reset behaviour by two jumpers on the pc board:
- Level triggered: the level at the Reset input triggers the Reset
- Edge triggered: the edge of the signal at the Reset input triggers the Reset
- Positive: a high level (> 2.5V) or the rising edge at the Reset input triggers the Reset
- Negative: a low level (< 1 V) or the falling edge at the Reset input triggers the Reset

Output polarity selected by a jumper on the pc board:
- Positive: non-inverted outputs
- Negative: all seven outputs are inverted

Width: 4HP / 20mm
Depth: 35mm (Measured from the rear side of the front panel)
Current: +12V: +50mA, -12V: -0mA
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MRP:$99.92 SAVE 11%
out of stock $89.15
Doepfer A-130-2 Dual Linear/Exponential VCA Slim Line Series Module
Cat: 731940 Rel: 11 Jun 19 • View all Synth modules
 
Compact two-channel VCA - 4HP
Notes: Module A-130-2 is the slim version of module A-132-3 and offers essentially the same features. But the distances between the controls are smaller and rubberized small-sized knobs are used. In return the front panel has 4 HP only which is half the width of the A-132-3. The module is primarily planned for applications where only limited space is available.

The module is composed of two identical voltage controlled amplifiers (VCA). Each VCA has a manual gain control (also named Initial Gain) and a control voltage input with attenuator. The character of the control scale can be switched to linear or exponential. All inputs and outputs are DC coupled. Consequently the VCAs can be used to process both audio and control voltages (e.g. for voltage control of the level of LFO or envelope signals). The signal input has no attenuator available but is capable to process up to 16Vpp signals (i.e. -8V...+8V) without distortion. For the processing of higher levels an external attenuator (e.g. A-183-1) is recommended.

The amplification range is 0...1. Even with a higher external control voltage the amplification remains at 1 (kind of "amplification clipping" at 1).

Controls (for each of both units):

- Gain: manual gain control (Initial Gain) in the range 0...1
- CV: attenuator for the CV input
- Lin/Exp: switches the VCA characteristic to linear or exponential, in center position the VCA is off (mute function)

Inputs and outputs (for each of both units):

- CV: control voltage input, min. +5V required for max. amplification (1) with CV control fully CW and Gain fully CCW
- In: signal input, max. 16Vpp (+8V...-8V) without distortion
- Out: signal output
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Tags: VCA module
MRP:$89.41 SAVE 15%
 1 in stock $75.72
Doepfer A-183-9 Quad USB Power Supply Module
Doepfer A-183-9 Quad USB Power Supply Module (power/quad/utility synth module)
Cat: 711015 Rel: 29 Nov 18 • View all Synth modules
 
Simple power supply for up to four devices - 2HP
Notes: Module A-183-9 is a simple power supply for up to four devices which can be powered via USB (e.g. keyboards, smartphones). An LED shows is the +5V are present.

The module has no USB function but provides only the +5V supply for USB devices.

A control LED shows if the +5V are present.

Note: The module requires an A-100 case with built in power supply A-100PSU3. Only this A-100 supply has the required +5V available. We do not recommend the usage of an older A-100 case with A-100PSU2 as this would require the +5V adapter A-100AD5 and the max. current would be limited to 100mA.
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 5 in stock $50.22
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Doepfer A-100C15 3.5mm Male Mono Patch Cable (yellow, 15cm long)
Cat: 757305 Rel: 28 Nov 19 • View all Audio Cables & Leads
 
High-quality patch cable designed for use with Eurorack modules
Notes: - High-grade patch cable designed for modular units
- 3.5mm mono jack plugs
- Length: 15cm
- Yellow finish
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MRP:$2.10 SAVE 25%
out of stock $1.58
Doepfer A-100C50 3.5mm Male Mono Patch Cables (grey, 50cm long)
Cat: 757313 Rel: 28 Nov 19 • View all Audio Cables & Leads
 
High-quality patch cable designed for use with Eurorack modules
Notes: - High-grade patch cable designed for modular units
- 3.5mm mono jack plugs
- Length: 50cm
- Grey finish
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MRP:$3.16 SAVE 50%
 4 in stock $1.58
Doepfer A-124 VCF5 Wasp Filter 12dB Multimode Filter Module (special edition, black/yellow)
Cat: 671564 Rel: 29 Nov 17 • View all Synth modules
 
12dB multi-mode filter with unique classic circuitry, based on the filter from the 70s EDP Wasp synth
Notes: Module A-124 is a special 12dB multimode filter using the "strange" filter circuit of the "EDP Wasp" (an analog synthesizer with black/yellow case built end of the seventies, manufactured by the UK company "Electronic Dream Plant" with Chris Huggett und Adrian Wagner). This design "abuses" digital inverters as analog operational amplifiers leading to distortions and other "dirty" effects that generate the specific sound of this filter. The filter is equipped with a band pass output and a combined low/notch/high pass output. For this output a control knob defines the relation between low and high pass signal. If both signals appear at the same level (i.e. middle position of the Mix knob) one obtains a notch filter. Otherwise the low or high pass signal predominates. The module does not feature self-oscillation in contrast to most of the other filters of the A-100 system.

Inputs: Audio In, CV In (2x)
Outputs: Bandpass Out, Low/Highpass Mix-Out
Controls: Audio and CV attenuator, Frequency, Resonance, LP/HP Mix

The function and operation of this module is very similar to the module SEM VCF A-106-5. But the sound of both filters is very different! The only functional difference is the position of the sockets and controls, and the function of the controls CV2 (A-124: normal attenuator, A-106-5: polarizer).

- 3U Eurorack module, 8HP wide, 45mm deep
- Current draw 30mA
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MRP:$88.35 SAVE 10%
 More than 10 in stock $79.94
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Doepfer A-138n Narrow Mini Mixer Slim Line Series Module (silver)
Cat: 731947 Rel: 10 Jun 19 • View all Synth modules
 
Compact 4-channel mixer - 4HP
Notes: Module A-138n is a simple four channel mixer, which can be used with either control voltages or audio signals. Each of the four inputs has an attenuator available. The output is twice available (two sockets, hard-wired like a multiple).

The module is the slim version of module A-138a and offers nearly the same features. But the distances between the controls are smaller and rubberized small-sized knobs are used. In return the front panel has 4 HP only which is half the width of the A-138a. The module is primarily planned for applications where only limited space is available. The only functional difference compared to the A-138a is the missing attenuator for the (dual) output.
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MRP:$68.37 SAVE 19%
out of stock $55.39
Doepfer A-151 Quad Sequential Switch Module (silver)
Cat: 577792 Rel: 06 Jun 19 • View all Synth modules
 
Electronic switch with up to four steps - 4HP
Notes: Module A-151 (Quad Sequential Switch) is like an electronic four-position rotary switch.

It includes trigger and reset inputs, four in / outputs, and a common out / input. Each time a pulse is received at the trigger input socket, the common out / input is connected to the next in / output. After the fourth in / output, the next trigger makes it step back to the first again, and so on. A positive pulse at the reset input switches the out / input immediately back to the first in / output (see Fig. 1). Voltages in the range -8V...+8V at the O/I resp. I/O sockets can be processed by the module.

Four LEDs indicate the active in / output (i.e. the on that is connected to the out / input at any particular time).
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 3 in stock $58.89
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Doepfer A-100B2 Blank Panel 2TE (silver)
Cat: 755424 Rel: 14 Nov 19 • View all Synth Module Accessories
 
Robust, blank front panel for use with modular racks & other applications - 2HP wide
Notes: Blank panel, 2HP, constructed from anodised aluminium, silver.
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 More than 10 in stock $3.42
Doepfer Male 6.3mm Jack To 3.5mm Mini Jack Adapter Cable (1.5m long)
Cat: 757329 Rel: 28 Nov 19 • View all Audio Cables & Leads
 
Adapter cable for modular systems
Notes: - 6.3 mm jack male mono to 3.5 mm jack male mono
- Length: 1.5 metres
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 More than 10 in stock $8.41
Doepfer A-105-2 24dB Low Pass (SSI-Type) Filter Module (silver)
Cat: 973741 Rel: 14 Nov 23 • View all Synth modules
 
24dB SSI low pass filter - 4HP.
Notes: Module A-105-2 is a voltage controlled low pass filter with 24dB/octave slope.

It is the successor of the A-105 which had to be discontinued because the obsolete SSM2044 filter circuit. The A-105-2 is based on the SSI2144 which is in turn the successor circuit of the SSM2044. The features of both modules are nearly the same. The main difference is the clearly reduced front panel width of the A-105-2 (4HP instead of 8HP) and the associated changes of the controls and sockets positions. In addition the A-105-2 is equipped with 2 audio inputs.

The module has these controls and in/outputs available:

Control Frequ: manual frequency control
Control FCV2: attenuator for the frequency control voltage applied to socket FCV2
Control Q: manual resonance control
Control QCV: attenuator for the resonance control voltage applied to socket QCV
Control Input 1 Level: attenuator for the audio input signal applied to socket Input 1
Socket Input 1: audio input 1 (with attenuator)
Socket Input 2: audio input 2 (without attenuator)
Socket FCV1: frequency control voltage 1 (without attenuator, about 1V/oct scale)
Socket FCV2: frequency control voltage 2 (with attenuator)
Socket QCV: resonance control voltage (with attenuator)
Socket Out: audio output
Technical notes:

Frequency range: about 15Hz ... 15 kHz
Resonance up to self oscillation
Max. input voltage at Input 2 without clipping/distortion: about 15Vpp
Max. output voltage without clipping/distortion: about 15Vpp
The signals of both inputs are mixed before they are processed by the filter. This saves an external mixer for small setups.
Depth: 45 mm

HP : 4
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 2 in stock $103.07
Doepfer A-100B4 Blank Panel 4TE (silver)
Cat: 755425 Rel: 14 Nov 19 • View all Synth Module Accessories
 
Robust, blank front panel for use with modular racks & other applications - 4HP wide
Notes: Blank panel, 4HP, constructed from anodised aluminium, silver.
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MRP:$4.21 SAVE 12%
 More than 10 in stock $3.69
Doepfer A-100C50A Angled 3.5mm Male Mono Patch Cable (orange, 50cm long)
Cat: 757319 Rel: 28 Nov 19 • View all Audio Cables & Leads
 
High-quality patch cable designed for use with Eurorack modules
Notes: - High-grade patch cable designed for modular units
- 3.5mm mono jack plugs
- Length: 50cm
- Angled connector on one end
- Orange finish
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MRP:$3.16 SAVE 42%
 More than 10 in stock $1.84
Doepfer A-138sv Mini Stereo Mixer Vintage Edition Module (black)
Doepfer A-138sv Mini Stereo Mixer Vintage Edition Module (black) (dual/stereo/mixer/panning/quad synth module)
Cat: 684443 Rel: 30 Apr 18 • View all Synth modules
 
Four-channel stereo mixer - 8HP
Notes: A-138s is a simple but useful 4-in-2 mixing tool. It has four inputs available. Each input is equipped with an attenuator (Level) and a panning control that is used to distribute the signal to the left and right output. Beyond stereo mixing it is equally suited to create variable parallel routings. For example: Any of the four inputs may be routed in variable intensity to feed two filters.

You may regard the A-138s as a smaller version of the A-138m Matrix Mixer.

Inputs and outputs are DC coupled, i.e. the module can be used for the mixing of control signals too.

- 3U Eurorack module, 8 HP wide, 30 mm in depth
- Power consumption: 10 mA at +12 V and 10 mA at -12 V
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! low stock $86.25
Doepfer A-155 Analogue Trigger Sequencer Module (silver)
Cat: 671601 Rel: 29 Nov 17 • View all Synth modules
 
Analogue sequencer for CV's & trigger/gates
Notes: The Doepfer A-155 has two CV rows, each with selectable voltage range, glide and sample & hold options. Three trigger rows and a one gate row. Logic inputs for clock, reset, start and stop. It's even possible to insert external signals per step instead, overriding the CV generated by the 2nd row's potentiometer. The A-155's functions can be expanded by the A-154 Sequencer Controller, as it's an entire control unit with step number limitation, voltage controllable clock generator, variable gate length and a number of playback modes.

Features of the analogue rows (knobs):

- 8 potentiometers (knobs)
- Lower row: Scale (knob), voltage output range 0 ... ~ +6,5V
- Upper row: 1V/2V/4V (octave range switch for exact VCO control), voltage output ranges 0 ...1.0V / 0 ...2.0V / 0 ...4.0V
- Glide time (knob), same as portamento or slew limiter
- Glide Control (control input for switching glide on/off)
- S&H Control (control input for internal S&H, works like A-148)
- Pre Glide/S&H-Out (analogue output before S&H and glide unit, especially required when external audio signals are used as inputs of the lower row)
- Post Glide/S&H-Out (analogue output after S&H and glide unit)
- Lower row: external inputs for the 8 steps (switched jack sockets), control signals or audio signals may be used as inputs (allowed voltage range -5V...+12V), the knobs of the lower row are working in this case as attenuators

Features of the trigger rows (switches):

- 4 Trigger/Gate tracks with 2 rows of switches
- Toggle switches of 1-0-1 type (with middle position), which can be used to send a trigger/gate to the track above or below or to send no trigger/gate (middle position)
- 3 trigger rows (i.e. short pulse for each step set, pulse width corresponds to the pulse width of the clock/step input signal)
- 1 gate row (i.e. a high signal is applied during the length of the step set)

Control inputs and buttons:

- Step (defines the tempo of the sequence, same as clock or trigger input)
- Reset (resets all rows to step 1)
- Start (starts the sequence at the momentary position)
- Stop (stops the sequence at the momentary position)

Step and Reset are compatible to the MIDI interface A-190, i.e. in combination with the A-190 the A-155 may be synchronized via MIDI. The quantizing module A-156 can be used to quantize the infinite analogue voltages coming from A-155 into discrete semitone steps (multiples of 1/12V). Without MIDI interface e.g. a LFO rectangle output can be used to define the tempo of the sequence.

The sequencer controller A-154 adds a lot of new functions to the A-155 (e.g. voltage controlled addressing, forward/backward/pendulum/random mode, voltage control of first and last step, voltage controlled clock and gate length, step skipping, combination of several A-155 in parallel/serial mode and many more).
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MRP:$314.50 SAVE 14%
out of stock $269.09
Doepfer A-148 Dual Sample & Hold - Track & Hold Module (silver)
Doepfer A-148 Dual Sample & Hold - Track & Hold Module (silver) (CV modulation/sample & hold/dual/stereo synth module)
Cat: 577745 Rel: 29 Nov 17 • View all Synth modules
 
Two sample & hold units in one module for generating stepped random voltages or slicing signals
Notes: Module A-148 (Dual S&H) has two identical sample & hold modules, designed to produce 'staircase' voltages. The signal present at the sample input is sampled at a rate set by the signal at the trigger input, and held at that voltage at the S&H output.

The exact shape of the staircase depends on the sort of waveform at the sample input: NOISE or RANDOM signals produce random patterns; an LFO produces rising or falling staircase patterns.

Two LEDs for each S&H indicate the voltage (positive or negative) of the sampled signal.
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 1 in stock $67.31
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Doepfer A-108 6/12/24/48dB Low Pass Filter Module
Cat: 692510 Rel: 19 Jun 18 • View all Synth modules
 
Classic Moog voltage-controlled lowpass filter - 12HP
Notes: Module A-108 is a completely new voltage-controlled low pass filter based on the well-known transistor ladder (Moog ladder). The module has internally an 8-stage low pass filter with different slopes available: 6, 12, 18, 24, 30, 36, 42 and 48 dB per octave. In addition, it features a band pass output (i.e. band pass with transistor ladder). In the factory, the 4 low pass outputs of the A-108 are internally connected to the filter stages 6, 12, 24 and 48dB.

Resonance (Emphasis or Q) can be adjusted manually right up to self-oscillation, in which case the filter will behave like a sine wave oscillator. The A-108 features an external feedback input that enables the insertion of additional modules into the feedback path (e.g. VCA for voltage-controlled resonance or phaser/frequency shifter for phase/frequency shifting effects). The socket is normalized and internally connected to the 48dB low pass output if no cable is inserted into the feedback socket.

The frequency can be adjusted manually, or by voltage control. Three CV inputs (CV1, CV2, CV3) are available. CV2 and CV3 are equipped with attenuators.

The filter audio input is very sensitive so that distortion - if desired - is possible even with normal A-100 levels (e.g. VCO output). Self-oscillation will break off at high distortion levels as the internal feedback signal is drown out by the distorted audio signal. This feature may intentionally be used to create new sounds.

In combination with the Voltage Controlled Mixer A-135 and the Morphing Controller A-144 a filter with voltage-controlled slope can be realized (i.e. controlling the slope from 6dB to 48dB via CV).
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MRP:$158.83 SAVE 13%
out of stock $138.79
Doepfer A-141-4 Quad Poly VCADSR Voltage Controlled Envelope Generators Module (silver)
Cat: 676693 Rel: 18 Jul 18 • View all Synth modules
 
Quad voltage controlled envelope generator - 8HP
Notes: A-141-4 is a quad voltage controlled Envelope generator and is primarily planned for polyphonic applications. The module contains four ADSR type voltage controlled envelope generators with common manual controls and CV inputs with polarizers for the all parameters Attack (A), Decay (D), Sustain (S) and Release (R). Each of the four envelope generators has available a gate input, a control LED and an envelope output.

The module has these controls and in/outputs are available:

- Attack (manual control)
- Decay (manual control)
- Sustain (manual control)
- Release (manual control)
- CVA control (polarizer for Attack CV input)
- CVD control (polarizer for Decay CV input)
- CVS control (polarizer for Sustain CV input)
- CVR control (polarizer for Release CV input)
- CVA socket (Attack CV input)
- CVD socket (Decay CV input)
- CVS socket (Sustain CV input)
- CVR socket (Release CV input)
- Gate inputs 1 - 4
- Envelope outputs 1 - 4
- LED displays 1- 4 (envelope display)

The output voltage range for each envelope is 0 - 10V.
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out of stock $155.67
Doepfer A-135-2 Quad VCA & Voltage Controller Mixer Module (silver)
Cat: 714704 Rel: 22 Jan 19 • View all Synth modules
 
Compact voltage-controlled four-channel audio mixer - 8HP
Notes: A-135-2 is a miniature version of the A-135-1. Behind a front panel with 8 HP only four linear VCAs (voltage controlled amplifiers) and a voltage controlled mixer based on the VCAs are available.

Controls, In/Outputs and Functions of each VCA:

- Level (manual control of the VCA amplification), small rubberized knob (L1...L4)
- Control voltage input with associated attenuator (CV1...CV4), for the full VCA control range about 0...+5V control voltage are required (attenuator fully clockwise), for higher control voltages the attenuator is used, the attenuators are without knobs, just plastic shafts with white marker
- Signal Input
- Signal Output
- All inputs and outputs are DC coupled. Consequently the VCAs can be used to process both audio and control voltages (e.g. to control the level of LFOs or envelopes)
- The signal input is not equipped with an attenuator. But the VCAs can process all signals up to 15Vpp / -7.5...+7.5V without clipping. In case of higher levels an external attenuator is required (e.g. A-183-1).
- The available amplification range is 0...1, the maximal amplification is 1 (i.e. it "clips" and remains at 1 even if the control voltage goes beyond the value that corresponds to amplification 1)

Functions of the voltage controlled mixers:

- Two outputs ("Selected" and "All")
- Selected output: the ouput if a VCA is removed from this sum signal when a plug is inserted into the corresponding VCA output.
- All output: sum of all VCA outputs, regardless of inserted plugs into the VCA outputs
- The maximal amplification is about 0.6 to avoid clipping at the mixer outputs (otherwise the outputs may distort with 15Vpp signals at each signal input and full amplifications)

Special functions of the voltage controlled mixers (selectable by internal jumpers):

- Dual Stereo VCA: In this case the control unit of VCA1 (L1 + CV1) affects also VCA3 and the control unit of VCA2 (L2 + CV2) affects also VCA4, the control units of VCA2 and VCA4 are out of operation
- Quad VCA: In this case the control unit of VCA1 (L1 + CV1) affects all four VCAs. The control units of VCA2, VCA3 and VCA4 are out of operation. In this mode the module has the same function as module A-132-2. That's why module A-132-2 will be discontinued.
- Normalling of the signal inputs: by means of internal jumpers signal input 1 can be normalled to signal input 2, signal input 2 to signal input 3 and signal input 3 to signal input In 4. That way the same input signal can be distributed to four different channels by means of control voltages (e.g. quadrophonic distribution of audio signals). Suitable control voltage sources are e.g. A-144 (Morphing Controller) or A-143-9 (Quadrature LFO).
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 1 in stock $126.21
Doepfer A-197-3 RGB LED Stripe Controller Module (silver)
Cat: 714708 Rel: 25 Mar 19 • View all Synth modules
 
Controller module for static & dynamic control of RGB LED stripes - 4HP
Notes: Module A-197-3 is a control unit for RGB LED stripes. The LED stripe is glued e.g. to the inner edges of the cases A-100P6/P9/PMS6/PMS9/PMS12 to illuminate the modules and patching statically or dynamically. Especially during live events the dynamic illumination in sync with the sound is an eye-catcher. Each colour (red, green, blue) has available a manual control for the background brightness and a CV input with attenuator that enables the dynamic brightness controlled by other control voltages of the modular system. For example three envelopes can be used which also control the loudness or filtering of sound processing modules. But even other control applications are possible, e.g. LFO, random voltages, clock/gate/trigger signals, sequencer, Midi-to-CV.
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 1 in stock $90.45
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Doepfer A-138nv Narrow Mini Mixer Vintage Edition Module (black)
Cat: 760211 Rel: 06 Mar 20 • View all Synth modules
 
Narrow mini mixer module - 4HP.
Notes: Compact and simple four-input mixer module from Uncle Dieter. Linear pots make it suited to mixing CV signals but it can also handle audio. Mixed signal hard-wired to two sockets.

Supplier notes:
Module A-138n is a simple four channel mixer, which can be used with either control voltages or audio signals. Each of the four inputs has an attenuator available. The output is twice available (two sockets, hard-wired like a multiple).

HP : 4
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 1 in stock $71.52
Doepfer A-100LC1Vv Low Cost Synth Module Case With Integrated Power Supply & Bus Board (black, 100-240V) Doepfer A-100LC1Vv Low Cost Synth Module Case With Integrated Power Supply & Bus Board (black, 100-240V) Doepfer A-100LC1Vv Low Cost Synth Module Case With Integrated Power Supply & Bus Board (black, 100-240V)
Notes: The A-100LC1v is a smaller version of the A-100LC3 with 48 HP of space. It is made out of raw wood, a black coating gives the Eurorack frame a vintage look. The built-in power supply, type A-100SSB, delivers up to 380 mA at +12 V and -12 V as well as 100 mA at +5 V.

The A-100LC1v comes equipped with one 48 HP measuring row for 3U modules. Its power supply features eight connectors for oscillators, filters and so forth. The case is connected to the grid via an IEC power socket.
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MRP:$219.83 SAVE 10%
out of stock $198.78
Doepfer A-160-1 Clock/Trigger Divider Module
Doepfer A-160-1 Clock/Trigger Divider Module (clock modulator synth module)
Cat: 577765 Rel: 10 Sep 19 • View all Synth modules
 
Frequency divider for clock, trigger & gate signals - 4HP
Notes: Module A-160 is a frequency divider for clock/trigger/gate signals, designed to be a source of lower frequencies, particularly for rhythm uses. The Trigger input will take clock signals from, e.g. an LFO, MIDI sync, or the gate from a MIDI-CV interface.

At the outputs, you have access to the sub-divided clock signals, from half the clock frequency down to 1/64. The low/high levels of the output signals are 0V and about +10V.

The A-160 also has a reset input. Whenever a reset signal is sensed, all outputs are set to zero, until the reset voltage disappears.

The Clock Divider can be used in combination with the A-161 Clock Sequencer to produce stepped sequences with a length of from one to eight events.
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out of stock $61.80
Doepfer A-138d Crossfader/FX Insert Module
Doepfer A-138d Crossfader/FX Insert Module (external/mixer synth module)
Cat: 716947 Rel: 29 Jan 19 • View all Synth modules
 
Crossfader for two different A-100 signals, plus insert for external effects
Notes: The A-138d primarily is used for crossfading between two modular signals. On the other hand you can used it for inserting stompboxes or other effects into your modular system. Both the inputs and the mix output are available twice, like a mini-multiples e.g. for using the input signal also for other applications, kind of like a Thru.

Crossfader: With the crossfading control CF you blend manually between the inputs In 1 and In 2. The Mute switch allows for muting one of the two signals, independent on the crossfader position.

Effect insert: The signal at input In1 is emitted at the FX Send output and can be attenuated with the Atten. control because the modular system works with much higher levels.

The effect unit's output is inserted to the FX Return input socket and its level can be boosted with the Amp. control. The processed signal is available at the bottom in 2 socket.

Use the CF control to blend between the original signal and the effect signal and to mute switch for quick muting e.g. of the effect return signal.
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out of stock $69.41
Doepfer A-100B4v Vintage Blank Panel 4TE (black)
Cat: 731210 Rel: 29 May 19 • View all Synth Module Accessories
 
Robust, blank front panel for use with modular racks & other applications - 4HP wide
Notes: Blank panel, 4HP, constructed from anodised aluminium, black.
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 More than 10 in stock $7.11
Doepfer A-111-6 Miniature Synthesiser Voice Slim Line Series Module (silver)
Cat: 731937 Rel: 15 Nov 19 • View all Synth modules
 
Complete miniature monophonic synthesiser module - 10HP
Notes: VCO:

- Tune: manual tune control (with an internal jumper the range can be set to ~ +/-1 half an octave or ~ +/-2.5 octaves)
- Oct: range switch -1 / 0 / +1 octave
- Mod: modulation depth (attenuator wired to the Mod. socket)
- Dest: switch that is used to address the modulation to frequency modulation (position FM) or pulsewidth modulation (positon PM), in centre positon no modulation
- PW: manual pulsewidth control for rectangle waveform, PW can be also modulated by the Mod. input as mentioned above
- Wave: waveform switch (sawtooth / off / triangle), the sum of the waveform chosen by this switch and the rectangle is fed into the VCF (to turn the rectangle off the PW control has to be set fully CCW or fully CW)
- 1V/Oct. (socket): external CV input for VCO frequency (1V/octave)
- Access to internal bus CV (via jumper, optional, please remove the bus jumper if this feature is not used to avoid unwanted frequency modulation as then the unused CV line of the bus works as a kind of antenna)
- Triangle core VCO, frequency range about 32Hz ... 8kHz

Balance unit:

- The balance unit is made of two VCAs which are controlled by the sum of manual Balance control and the balance CV input in the opposite direction.
- The audio input of VCA1 is hard-wired to the VCO output, audio input 2 is connected to the socket Ext.In.
- The output of the balance unit is used as audio input for the VCF
- Bal.: manual balance control, fully CCW the internal VCO is used, fully CW the external signal (Ext.In) is used, at centre position both signals have about the same level
- CV Bal.: CV input for balance (range about 0...+5V)
- Ext. In: external audio input for VCA2, about 5 Vpp level required for similar loudness as the internal VCO
- This socket is normalled to the internal VCO suboctave f/2 signal (rectangle with half the frequency), if no external signal is applied the suboctave signal is used as the second signal for the balance unit

VCF:

- 24 dB low pass
- Frq: manual frequency control
- FM1: frequency modulation depth (attenuator wired to the VCF FM1 socket, the socket is normalled to the internal Envelope signal and then FM1 controls the modulation depth of the internal envelope applied to the filter)
- FM2 (socket) : second CV input for VCF without attenuator (about 1V/octave), can be used e.g. for VCF tracking by connecting the same CV which is used also for the VCO frequency
- Res: manual resonance control (up to self oscillation)
- If the VCO is turned off (waveform switch = centre position, pulsewidth control = fully CCW or CW) and the VCF resonance is set to maximum the module can be used as a sine oscillator, the tracking at socket VCF FM2 is about 1V/octave (not as precise as the VCO but much better than most other filters)
- ~ 11 octaves frequency range (~ 10 Hz ... 20kHz)

VCA:

- Gain: manual amplitude control (initial gain), can be used to open the VCA without envelope signal
- VCA (switch): used to switch between gate and envelope as control signal for the VCA, in centre position the VCA is not controlled by envelope or gate
- Note: when gate is used the VCA is controlled directly by the gate signal (i.e. hard on/off), this may lead to clicking noise under certain conditions (especially with low VCO/VCF frequencies)
- Special control scale: exponential scale in the range from about -20dB to -80/90dB, linear scale from about -20dB to 0dB
- Remark: this special control scale results in a loudness behaviour that is a bit different from pure linear or exponential VCAs
- Out: audio output of the module (= VCA output)

Envelope:

- Gate (socket): Gate input (min. +5V), can be normalled to the bus gate signal by means of a jumper
- Att: manual control for Attack
- D/R: manual control for Decay/Release
- Env. (switch): used to switch between A/D, ADSR and A/R mode of the envelope generator, in centre position (ADSR) the sustain level is fixed to about 50%
- Envelope (socket): envelope output (about +10V)
- CVT (socket): CV input for time control, by means of two internal jumpers one can select which time parameters are controlled by the CVT input (e.g. A only or D/R only or A/D/R) and in which direction (i.e. if an increasing CVT shortens or stretches the time parameter in question)
- Envelope LED display
- Attack time range: ~ 1ms ... 5 sec (can be extended by using the CVT input)
- Decay/Release time range: ~ 1ms ... 15 sec (can be extended by using the CVT input)
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out of stock $176.70
Doepfer A-121-3 12dB Multimode VCF Slim Line Module
Cat: 731939 Rel: 11 Jun 19 • View all Synth modules
 
Voltage controlled 12dB/octave filter - 8HP
Notes: Module A-121-3 is functionally nearly identical to module A-121-2. Only the distances between the controls and sockets are smaller and rubberized, small rotary knobs are used. Therefore the front panel width is only 4HP compared to 8HP of the A-121-2. In the first place it is planned for applications where only limited space is available. The only functional difference compared to the A-121-2 is the missing attenuator for the resonance CV input CQ.

These are the most important features of the module:

- Voltage-controlled multi-mode filter with a cut-off slope of -12 dB / octave (identical to the filter of the Dark Energy II/III but has been expanded by the voltage controlled resonance feature)
- Four simultaneous outputs are available, each with different characteristics: low-pass (LP), high-pass (HP), band-pass (BP) and notch (N)
- Manual control Frequ. for the cut-off frequency of the filter (the cut-off frequency determines the point at which the respective filter effect appears)
- Two inputs for frequency control by means of external control voltages (frequency modulation, e.g. by ADSR or LFO):
- Control voltage input CV1 without attenuator, about 1V/octave sensitivity
- Control voltage input CV2 with attenuator FCV2 for the adjustment of the modulation depth of input CV2
- Frequency range about 10Hz ... 20kHz
- Manual control Q for the resonance of the filter
- Control voltage input CQ without attenuator for voltage control of the resonance
- Resonance up to self-oscillation, in which case the module will behave like a sine wave oscillator even without audio input signal
- Audio input In with attenuator Level for the adjustment of the filter input level (beyond about pos. 5 clipping/distortion occurs with typical A-100 audio levels)
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out of stock $95.71
Doepfer A-138i Interrupting Mixer Slim Line Series Module (silver)
Cat: 731945 Rel: 10 Jun 19 • View all Synth modules
 
Multi-featured mixer - 6HP
Notes: Module A-138i is a four channel mixer with an additional mute switch for each input. On top of that it is equipped with two types of single outputs and a dual mix output. All inputs and outputs are DC coupled. Consequently the VCAs can be used to mix both audio and control voltages.

Each input is - apart from the mute switch - equipped with the usual attenuator.

The single outputs offer the attenuated and possibly muted signal of the channel in question. Two version of single outputs are available:

Single Output A: If a plug is inserted into the single output "A" socket the channel in question is removed from the sum signal.

Single Output B: If a plug is inserted into the single output "B" socket the channel in question is not removed from the sum signal. This type of single outputs is available only for the channels 1 and 2.

The output is twice available (two sockets, hard-wired like a multiple).

The distances between the controls and sockets are smaller as for the standard A-100 modules and rubberized small-sized knobs are used. In return the front panel has 6 HP width only. The module is primarily planned for applications where only limited space is available.
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out of stock $82.03
Doepfer A-189-1 VBM Voltage Controlled Bit Modifier & Bit Cruncher Module
Cat: 755405 Rel: 14 Nov 19 • View all Synth modules
 
Voltage controlled bit modifier module for the Eurorack A-100 system
Notes: Module A-189-1 is a voltage controlled bit modifier. It offers several voltage controlled algorithmic functions like voltage controlled bit crunching, bit shifting (with/without carry over), bit exchange, rectifying, absolute value and calculating operations like addition, subtraction, multiplication or division.

The module has two control units both with manual control and CV input with attenuator:

- One for the algorithmic function according to the selected mode (e.g. number of shifted bits): BC and BC CV
- One for the sampling rate (SR and SR CV).

The signal input is equipped with an attenuator. As the module is DC coupled even control voltages can be processed.

The mode (e.g. bit crunching, bit shifting, bit exchange) is selected by a 16-position rotary switch.
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out of stock $104.12
Doepfer A-100B8 Blank Panel 8TE (silver)
Cat: 755427 Rel: 14 Nov 19 • View all Synth Module Accessories
 
Robust, blank front panel for use with modular racks & other applications - 8HP wide
Notes: Blank panel, 8HP, constructed from anodised aluminium, silver.
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out of stock $4.47
Doepfer A-100 SSB Small Supply Bus Board & Power Supply Doepfer A-100 SSB Small Supply Bus Board & Power Supply Doepfer A-100 SSB Small Supply Bus Board & Power Supply
Cat: 755432 Rel: 13 Nov 19 • View all Synth Module Accessories
 
Power supply & bus board with 8 connectors for modular synthesisers
Notes: A-100SSB is a combination of power supply and bus board with 8 connectors for A-100 modules, planned for applications with up to 8 modules and a max. current of 380 mA.

- Wide range mains voltage input 100-240V AC / 50-60 Hz
- IEC inlet on board for the connection of a suitable mains cable (a suitable mains cable has to be purchased by the customer locally, it's not included with the A-100SSB)
- Switching supply with +12V/380 mA and -12V/380mA for the operation of A-100 modules up to 380 mA total supply current
- Safety cover at the bottom side (covers all elements that lead mains voltage)
- On board fuse
- 8 bus connectors
- LED displays for +12V, -12V and +5V
- Dimensions: about 270 mm (length) x 55 mm (width) x 35 mm (height)
- Several 3mm holes for mounting the unit on a rear panel or bottom plate
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 1 in stock $99.92
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Doepfer Dark Time MIDI/USB Analogue Sequencer (white & blue LED version, supplied with 2 pin Euro plug)
Cat: 755439 Rel: 12 Nov 19 • View all Sequencers
 
MIDI/USB analogue sequencer with white/blue LEDs (240V only)
Notes: Iconic analogue step sequencer from modular innovators Doepfer. Compatible with all MIDI or CV/gate synths, allowing a huge range of programming and sequencing options, plus real-time tweaking. A firm Juno favourite.

Supplier's notes:
Dark Time is an 2x8 step analogue sequencer with CV/Gate, USB and MIDI interface. It is intended as an add-on for the Dark Energy but may be used in combination with other MIDI, USB or CV/Gate equipment too.
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out of stock $454.38
Doepfer A-199 SPRV Federhall Spring Reverb Module (silver)
Cat: 577748 Rel: 15 Aug 18 • View all Synth modules
 
Reverb effects module with spring reverb tank - 8HP
Notes: Module A-199 is a spring reverb module. The reverb effect is electronically simulated by means of 3 spiral springs. Spring reverb systems have a very characteristic sound that is based on the (insufficient) mechanical properties of the springs like signal delays, audio resonances, limited frequency range, acoustic feedback behaviour, sensitivity to mechanical shocks and others.

The 3-spring system used in the A-199 ensures a "dense" reverb because of the different properties of the three springs.

The A-199 implies some special features that are not self-evident for spring reverb units:

The reverb signal can be fed back to the input using the Feedback control. Even self-oscillation of the springs similar to the self-oscillation of filters is available. The feedback loop can lead even via external modules like VCA, VCF, phaser, frequency shifter, vocoder, distortion/waveshaper, ring modulator and others. In this case the reverb output of the A-199 is connected to the input of the external module(s) and the output of the external module(s) is fed back to the Ext. Feedback In socket of the A-199. This socket contains a switch that interrupts the internal feedback loop as soon as a plug is inserted.

Another feature is the Emphasis control. This enables the adjustment of the accentuation of middle frequencies (around ~ 2kHz).

With the Mix control the relation between original and reverb signal appearing at the mix output is adjusted.

Using all these features very extreme and unusual effects can be generated with the A-199.
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out of stock $119.90
Doepfer A-100C30 3.5mm Male Mono Patch Cable (black, 30cm long)
Cat: 757310 Rel: 28 Nov 19 • View all Audio Cables & Leads
 
High-quality patch cable designed for use with Eurorack modules
Notes: - High-grade patch cable designed for modular units
- 3.5mm mono jack plugs
- Length: 30cm
- Black finish
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MRP:$3.16 SAVE 50%
 More than 10 in stock $1.58
Doepfer A-100C50T 3.5mm Male Mono Patch Cable (transparent, 50cm long)
Cat: 757316 Rel: 28 Nov 19 • View all Audio Cables & Leads
 
High-quality patch cable designed for use with Eurorack modules
Notes: - High-grade patch cable designed for modular units
- 3.5mm mono jack plugs
- Length: 50cm
- Transparent cabling
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MRP:$3.16 SAVE 34%
 More than 10 in stock $2.10
Doepfer A-100C80 3.5mm Male Mono Patch Cable (red, 80cm long)
Cat: 757323 Rel: 28 Nov 19 • View all Audio Cables & Leads
 
High-quality patch cable designed for use with Eurorack modules
Notes: - High-grade patch cable designed for modular units
- 3.5mm mono jack plugs
- Length: 80cm
- Red finish
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MRP:$3.16 SAVE 42%
 More than 10 in stock $1.84
Doepfer Male 6.3mm Jack To 3.5mm Mini Jack Adapter Cable (3.0m long)
Cat: 757331 Rel: 28 Nov 19 • View all Audio Cables & Leads
 
Adapter cable for modular systems
Notes: - 6.3 mm jack male mono to 3.5 mm jack male mono
- Length: 3 metres
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 9 in stock $10.26
Doepfer A-100 Synth Module Vintage Rotary Knob (black, single)
Cat: 757360 Rel: 28 Nov 19 • View all Synth Module Accessories
 
Replacement knob for Doepfer modules - vintage design
Notes: High quality rotary knob, for use with Doepfer or a wide range of modules. Robust design with indented edges. Retro style finish.
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MRP:$4.21 SAVE 12%
 More than 10 in stock $3.69
Doepfer A-196 PLL Phase Locked Loop Module (B-STOCK)
Doepfer A-196 PLL Phase Locked Loop Module (B-STOCK) (filter/oscillator/effect synth module)
Cat: 994989 Rel: 01 Jan 90 • View all Synth modules
 
B-STOCK: Box damaged, product in perfect working order
Notes: ***B-STOCK: Box damaged, product in perfect working order***


Module A-196 contains a so-called phase locked loop (PLL). The basic PLL system is shown in the sketch at the bottom of this page. A PLL consists of three parts: voltage-controlled oscillator (VCO), phase comparator (PC), and low-pass filter (LPF). All parts are normally connected to form a closed-loop frequency-feedback system.

This is how a PLL works: The output of the internal VCO (linear CV control, rectangle output) is compared with an external signal (e.g. the rectangle output of a A-110 VCO) in the so-called phase comparator (PC). The output of the phase comparator is a digital signal (low/high/tristate) that indicates if the frequency resp. phase difference of the two input signals is negative, zero or positive. The output of the phase comparator is processed by a low pass filter (LPF) to generate a smooth voltage that is used to control the frequency of the internal VCO. The 3 units VCO, PC and LPF form a feedback loop that works like this: The control voltage (output of the LPF) increases as long as the external frequency is higher than the frequency of the internal VCO und stops increasing when both frequencies become identical. The control voltage decreases as long as the external frequency is lower than the frequency of the internal VCO und stops decreasing when both frequencies become identical.

But there are some stumbling blocks: Different types of phase comparators with advantages and disadvantages can be made. Some phase comparators e.g. even lock at harmonics, i.e. if the two frequencies to be compared are integer multiples. But for some applications this can be used to create interesting effects. The A-196 contains 3 different types of phase comparators: PC1 is a simple exclusive OR, that even locks at harmonics. PC2 is a so-called RS flipflop and PC3 a more complex digital memory network. The user can select one of the three phase comparators with a 3-position switch. When PC2 is used a LED displays the "locked" state, i.e. when the frequency of the internal VCO is identical to the external frequency.

Special attention has to be directed to the frequency of the LPF. To obtain a smooth control voltage for the VCO the frequency of the LPF has to be much smaller than the lowest frequency of the internal or external audio signal. Otherwise the frequency of the internal VCO will jitter or wobble around the correct frequency. But for special effects this frequency jitter can be used intentionally. Example: frequencies in the range 50Hz...1kHz have to be processed with the PLL. Therefore the frequency of the LPF has to be about 10Hz or even less. Such a low frequency of the LPF causes a noticeable slew of the internal VCO. When the frequency of the external signal jumps e.g. between 500Hz and 1kHz it takes about 0.1 second until the internal VCO reaches the new frequency (like portamento). So one has to find a compromise between frequency jitter and portamento. But these remarks are valid only for the "ideal" working PLL. As the A-196 is used in a musical environment the "problems" and disadvantages with jitter and slew time lead to additional musical applications like portamento effects, wobbling frequencies or harmonic locking according to the type of frequency comparator and time constant of the PLL low pass filter. Instead of the internal manually controlled low pass filter the voltage controlled slew limiter A-171 can be used to obtain voltage control of this parameter. Normal audio filters (e.g. A-120, A-121) cannot be used for this job as the minimum frequency is to high (down to a few Hz or even less necessary) and the signal has to be DC coupled due to the low frequencies. Audio filters are normally AC coupled.

Another very important application of a PLL is frequency multiplication in combination with an external frequency divider. For this the output of the PLL-VCO is processed through an external frequency divider (e.g. A-163, A-160, A-161, A-115) before it is fed to In1 of the phase comparator. In this case the frequency of the PLL-VCO will be a multiple of the master frequency. E.g. if the A-163 is used and adjusted to dividing factor 5 the frequency of the PLL-VCO will be 5 times the frequency of the master VCO. Consequently, frequency division (A-163) leads to frequency multiplication with the PLL circuit. In combination with the PLL low pass frequency several effects can be realized (frequency multiplication with portamento or wobbling). The frequency multiplication can even be used to drive a graphic VCO. If your graphic VCO e.g. has 8 steps (e.g. A-155) and you use a frequency divider with factor 8 in the PLL feedback the output of the graphic VCO has the same frequency as the master VCO. Another application is the generation of pseudo-harmonics (not real harmonics as only rectangle waves are available) or clock generation for switched-capacitor filters.
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MRP:$78.89 SAVE 10%
out of stock $70.78
Doepfer A-100B1.5 Blank Panel 1.5TE (silver)
Cat: 755422 Rel: 14 Nov 19 • View all Synth Module Accessories
 
Robust, blank front panel for use with modular racks & other applications - 1.5 HP wide
Notes: Blank panel, 1.5 HP, constructed from anodised aluminium, silver.
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 More than 10 in stock $3.42
Doepfer A-100C80T 3.5mm Male Mono Patch Cable (transparent, 80cm) Doepfer A-100C80T 3.5mm Male Mono Patch Cable (transparent, 80cm)
Notes: Patch cable for modular synthesizer 80 cm, transparent, mono jack plug 3.5 mm at each end.
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MRP:$4.21 SAVE 38%
 More than 10 in stock $2.63
Doepfer A-100C120 3.5mm Male Mono Patch Cable (blue, 120cm long)
Cat: 757325 Rel: 04 Sep 21 • View all Audio Cables & Leads
 
High-quality patch cable designed for use with Eurorack modules
Notes: - High-grade patch cable designed for modular units
- 3.5mm mono jack plugs
- Length: 120cm
- Blue finish
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 More than 10 in stock $2.10
Doepfer A-185-2v Precision Adder/Bus Access Vintage Edition Module (black)
Doepfer A-185-2v Precision Adder/Bus Access Vintage Edition Module (black) (attenuator/CV modulation/mixer/multiple/utility synth module)
Cat: 751764 Rel: 23 Oct 19 • View all Synth modules
 
Precision adder (mixer) and buffer for control voltages - 6HP
Notes: Module A-185-2 is a precision control voltage adder/buffer. Precision means that the amplification of the inputs without attenuators is exactly 1.00 and is suitable to add control voltages for the pitch control of VCOs (e.g. from keyboard + sequencer 1 + sequencer 2). Summing resistors matched to 0.1% are used to obtain an accuracy of 0.1% for the added voltages.

The module is equipped with four CV inputs: one with attenuator and three without attenuator. Each input is normalled to +1 V (i.e. if no plug is inserted the input contributes 1 V to the sum appearing at the output).

The input with attenuator can be used for common modulations (e.g. from an LFO, ADSR, Theremin, Pitch-Bender) for all VCOs connected to the output. The Lev.1 control is used to adjust the depth of the modulation, the first switch selects the polarity of the modulation. If no signal is connected to the first socket the attenuator works as a (fine) tuning knob because a voltage in the range 0...+1V (right position of the switch) or 0...-1V (left position of the switch) is added to the CV output.

The inputs without attenuators are planned to add control voltages coming out of keyboards, sequencers, Midi-to-CV interfaces, ribbon controllers or other CV sources that follow the 1V/oct standard. For example the CV of a keyboard can be used to transpose the CV coming from a sequencer, or the CV of a slow sequencer can be used to transpose the CV from a fast sequencer.

Each input is equipped with a three-position switch that determines if the corresponding voltage is added (right position), subtracted (left position) or if the input has no effect (centre position). If no plug is inserted the corresponding switch works as an octave switch for the lower three sections as the default 1 V are added or subtracted to the output voltage according to the switch position. The first switch can be used to add a variable voltage to the sum output. The variable voltage is adjusted with the Lev.1 control and the knob works then as kind of a (fine) tuning control.

The module is equipped with 4 outputs: three non-inverting and one inverting ouput. An internal jumper can be used to connect the non-inverted or inverted output to the CV line of the A-100 bus. That way the module can used to control several VCOs that are connected to the same bus board as the A-185-2 (same functionality as A-185-1).
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 1 in stock $83.09
Doepfer A-103 VCF6 18dB Low Pass Filter Module
Cat: 692504 Rel: 18 Jun 18 • View all Synth modules
 
18dB low pass filter based on a modified Moog cascade - 8HP
Notes: Module A-103 is a voltage controlled low pass filter with 18dB/octave slope. The circuit is based on a modified transistor ladder (Moog ladder) and is a reproduction of the legendary TB303 filter.

As for the rest the A-103 is identical to the A-120 Moog low pass filter (same controls, inputs/outputs) only the filter sound is different.
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 1 in stock $90.45
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Doepfer A-152 Voltaged Addressed Track & Hold/Switch Module
Doepfer A-152 Voltaged Addressed Track & Hold/Switch Module (switch/clock modulator/logic/sample & hold synth module)
Cat: 745781 Rel: 09 Sep 19 • View all Synth modules
 
Complex switch/multiplexer unit - 16HP
Notes: Module A152 is a very useful switching and T&H module. It combines a voltage addressed 1-to-8 multiplexer and 8 fold T&H that can be used as kind of an analogue shift register too. The active in/output is displayed by a LED. The digital output of the currently addressed step outputs "high". The remaining digital outputs are low.

Instead of voltage control even clock/reset controlled addressing of the active step is possible. The rising edge of each clock signal causes an advance to the next state. The rising edge of the reset signal resets to step 1.

The sum of the voltages coming from the manual Address control and the CV input define the currently addressed step of the 3 sub-devices. If the module is controlled by clock and reset the control voltage has to remain unchanged as the CV control has priority over the clock/reset control (e.g. simply turn the CV control fully counter-clockwise and do not touch the Address control knob).

Sub-device #1 is the bidirectional 8-fold multiplexer (kind of an electronical 8-fold rotary switch). Bidirectional means that it works into both directions like a mechanical rotary switch: the common socket may work as an output that is connected to one of the 8 inputs that are e.g. connected to modulation or audio sources. But the common socket may even function as input. In this case the signal applied to the common socket is output to the currently addressed single socket. The voltage range of the in/outputs to be switched is the full A-100 voltage range -12V....+12V. All A-100 signals can be switched without any restrictions.

Sub-device #2 is the addressed 8-fold T&H. The signal at the common T&H input is connected to the addressed T&H output. As soon as a new output is addressed the last voltage is stored at the output (Track&Hold function). The T&H section of the A-152 allows the emulation of the "toggling T&H" function of the Buchla module 266 "Source of Uncertainty". Only the first two T&H outputs of the A-152 are required for this application. This unit can be used also as kind of an analogue (shift) register. The difference to a "real" analogue shift register is that the sampled output voltages are not shifted to the next output but remain allocated to the same output. But in some cases (e.g. controlling the pitch of 3 VCOs by 3 output voltages of the A-152) the result is the same.

Sub-device #3 is the digital output section. The digital output of the currently addressed turns to "high". All other digital outputs are low. The digital outputs can be used to trigger e.g. envelope generators or to control the reset input in the clocked mode to reduce the number of addressed stages.
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out of stock $141.98
Doepfer A-178 Theremin Control Voltage Source Module (silver)
Doepfer A-178 Theremin Control Voltage Source Module (silver) (controller/CV modulation/utility synth module)
Cat: 751716 Rel: 23 Oct 19 • View all Synth modules
 
Theremin controller module - 8HP
Notes: Theremin module for generating a variable control voltage by approaching/removing hand to/from an antenna. The distance range is about 30-40 cm. Additionally the module is equipped with a Gate output with adjustable threshold level. Controls/Inputs/Outputs: antenna input, offset (knob for zero adjust), 2 x CV out, 2 x LED (for CV control positive/negative and zero offset adjust).

To simulate the original Theremin two A-178, a VCO (e.g. A-110) and a linear VCA (e.g. A-130 or A-132) are required. But of course the A-178 can be used to control other functions in the A-100 (e.g. filter frequency, modulation depth and/or speed, tempo, attack/decay time and so on).

The CV output voltage of the A-178 can range - according to the setting of the front panel controls - from -10V...+10V. The gate output switches from 0V to about +10V.

Applications:

- Controlling any voltage controlled parameter of the A-100, e.g. pitch or pulsewidth (VCO A-110), loudness (VCA A-130/131/132), panorama (A-134), filter frequency or resonance (A-120/121/122/123), phasing (A-125), frequency shift (A-126), resonance peaks (A-127), envelope parameters (A-141/142), tempo (A-147)

- Triggering of A-100 activities via gate with adjustable threshold, e.g. starting an envelope (A-140/141/142), Start/Stop of a sequence (A-155), any switching function (A-150/151)

- Conversion into MIDI control change messages is possible with the A-192.

If two or more A-178 are used the distance between the modules/antennas should be at least 40-50 cm. Otherwise the antennas may affect each other.
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 1 in stock $98.87
Doepfer A-147-2 Voltage Controlled Delayed Low Frequency Oscillator Module (silver)
Doepfer A-147-2 Voltage Controlled Delayed Low Frequency Oscillator Module (silver) (envelope generator/LFO/VCA/CV modulation synth module)
Cat: 671585 Rel: 29 Nov 17 • View all Synth modules
 
Module consisting of voltage-controlled low frequency oscillator (LFO) & voltage controlled amplifier (VCA) - 8HP
Notes: Module A-147-2 is the successor of the VCLFO A-147 but offers much more features than the predecessor. The module is made of these sub-units:

- VCLFO: voltage controlled low frequency oscillator
- VCA: voltage controlled amplifier, switchable to voltage controlled polarizer
- VC delay unit: voltage controlled linear attack envelope (only one parameter: attack) for delayed LFO operation in combination with the VCA (e.g. delayed vibrato/tremolo)

LFO: The voltage controlled LFO has the waveforms Triangle, Sine, Sawtooth and Rectangle available and features a Reset/Sync input. Triangle/Sine and Rectangle are displayed by means of dual-colour LEDs (probably red/green), Sawtooth has a unicolor LED available (probably blue). The output levels are about -4V...+4V for Triangle, Sine and Rectangle. The Sawtooth level is about 0...+8V.

The CV control can be switched to attenuator or polarizer ("CV Mode" switch). In polarizer mode the CV inputs affects the frequency in the reverse manner when the CV control is left from the centre position. In the centre position CV has no effect and right from the centre the control works like a normal attenuator. The frequency range (without external CV) is from about 0,005 Hz (i.e. about 3 minutes per period) to 200 Hz (with external CV max. frequency about 1kHz). In addition a ultra-low mode can be activated by means of an internal jumper. When the ultra-low jumper is set a fixed voltage is connected to the switching contact of the "LFO CV" socket. In polarizer mode of the CV control that way extremely low frequencies (up to one hour period and more) are possible. For this a jumper has to be installed on the pin header JP6. In the factory a dummy jumper is installed on the pin header JP7 "Dummy". JP7 has no function and is used only for "parking" of the jumper. Simply remove the jumper from JP7 and plug it on JP6. JP6 is located behind the CV control.

VCA: This is a linear VCA that can be switched to "normal" VCA (i.e. kind of a voltage controlled attenuator) or voltage controlled polarizer ("VCA Mode" switch). In the "normal" VCA mode amplification +1 is achieved with about +5V control voltage. In polarizer mode the amplification ranges from about -0.5 (i.e. inverted signal with about 50% level) with 0V CV to +0.5 (i.e. non-inverted signal with about 50% level) with +5V CV. With about +2.5V CV the signal is suppressed. Details about the functioning of a voltage controlled polarizer can be found in the description of the module A-133. In this mode the VCA can be treated also a DC coupled ring modulator (similar to A-114).

The VCA of the A-147-2 has three sockets available: "In" (signal input), "Out" (signal output) and "CV" (control voltage input).

The Triangle Output of the LFO is normalled to the VCA signal input by means of the switching contact of the "VCA In" socket. If another LFO waveform (or any other signal) should be processed by the VCA the corresponding signal has to be patched to the "VCA In" socket. The VCA can be used also independently from the LFO and the Delay CV. In this case the VCA sockets In, Out and CV have to be patched accordingly. The VCA can be used also as waveshaper for the LFO signals (e.g. by patching VCA In and VCA CV to different LFO signals, if necessary via attenuator A-183-1 or offset generator/attenuator A-183-2).

Attack/Delay: The third sub-unit of the module is a simple, voltage controlled envelope generator that has only the parameter "Delay" (or Attack) available. This unit generates a linear increasing voltage that starts from 0V after each Delay Reset until it reaches about +5V. Then the voltage remains at +5V until the next Delay Reset occurs. The inclination or gradient is controlled by the manual Delay control and the Delay control voltage ("Delay CV" input). The waveform is linear, the control scale is exponential. The output voltage is displayed by a green LED and available at the "Delay Out" socket.

The manual Delay control ranges - without external "Delay CV" - from about 5ms (fully CW) up to 2 minutes (fully CCW). By means of an external voltage applied to the "Delay CV" socket this range can be extended. A rising CV shortens the delay time (behaviour like a VCO)!

The Delay output voltage ranges from about 0V to +5V. The rising edge of the gate, clock or trigger signal applied to the "Delay Reset" sockets resets the Delay output voltage to 0 V.

"Delay Out" is normalled to the VCA CV input by means of the switching contact of the "VCA CV" socket and consequently controls the Triangle level provided that no other patch is made. A typical example is the usage of a Gate signal (e.g. from a USB/Midi-to-CV/Gate interface) as Delay Reset. That way a delayed vibrato or tremolo can be realized if the VCA output is patched to the frequency CV input of a VCO (or VCF), or the CV input of a VCA.
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 1 in stock $117.80
Doepfer A-100C200 3.5mm Male Mono Patch Cable (green, 200cm long)
Cat: 757328 Rel: 02 Dec 19 • View all Audio Cables & Leads
 
High-quality patch cable designed for use with Eurorack modules
Notes: - High-grade patch cable designed for modular units
- 3.5mm mono jack plugs
- Length: 200cm
- Green finish
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