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Maxon's current-production reissue captures all the magic of the original with the added benefit of true bypass switching.
The SD-9 provides a smooth distortion that covers a wide range of Gain levels from mild overdrive through pseudo-fuzz. Regardless of the Gain setting, the SD-9 remains articulate and responsive to note dynamics, providing excellent sustain without crossing over into super-compressed Metal territory.
The SD-9's Tone knob has plenty of top end on tap, yet notes still retain a round, full-bodied tonality with the low end presence usually associated with amp distortion. The pedal's midrange response is smooth and even - present without seeming spiked.
Since its humble origins to its current place in the pedalboards of the stars, the Maxon Sonic Distortion has proven itself to be a timeless classic that has only improved with age.
Since its original release in the early 80's the Sonic Distortion has gained a huge cult following among tone connoisseurs, including the likes of guitar legends Scott Henderson and Mike Landau.
"The Maxon SD-9 is the best distortion pedal EVER made, period. It has the clarity and punch you get from a pedal, while retaining the low bass you get with amp distortion. The SD-9 is one of the rare pedals which sound equally great on both the neck and bridge pickups, whether they're humbucking or single coil. It's been a very important part of my tone for many years." - Scott Henderson
Input signal goes through a simple High-Pass filter into a transistor that's set up as an emitter / follower (high input impedance - low output impedance). After this it's into an Op Amp stage designed to give a gain range of 67 to 567and a Low-Pass Filter with a corner frequency of approximately 1540 Hz.
From here it's on to a set of opposing-direction diodes to ground and a tone control that is reminiscent of the Boss DS-1 (kind of a Big Muff dual High and Low cut - ending up with a mid scoop that has a high frequency limiting resistor with corner frequencies of 867Hz and 234Hz respectively).
The SD-9's dual diodes to ground give a crunchier, chewier distortion than the popular 808-style "diodes in feedback loop" configuration. Likewise, the SD-9's mid scoop is practically the antithesis of the 808's infamous mid hump.
After the tone control section it's through to a volume control and into another E / F transistor to provide a low impedance output and then on to the true bypass switch.
The SD-9 features Mechanical True Bypass switching via a Fujisoku 4PDT switch - Input is switched to ground when bypassed.
Input Impedance: 500K Ohms
Input Jack: 1 / 4 inch standard phone jack
Output Impedance: 10K Ohms
Output Jack: 1 / 4 inch standard phone jack
Equivalent Input Noise: -114 dB or less (input shorted IHF-A weighted)
Maximum Output Level: 0 dBm
Maximum Gain: +42 dB (at 2.0 KHz)
Controls: Distortion, Tone, Level
Switch: Normal / Effect (true bypass configuration)
Power Supply: 9V Manganese dry cell battery (6F22) or special AC adaptor
Power Voltage: DC9 V (Battery) / DC10 V (AC-adaptor)
Current Consumption: 6 mA (9 V) / 7 mA (10 V)
AC Adaptor: AC210N (option) Input: AC120V Output: DC9V / 200 mA Center - / Sleeve +)
Dimensions (whole): 74 mm (W) x 124 mm (D) x 54 mm (H)
Weight: 580 g
Warranty Card: x 1
User's Manual: x 1
If you decide an equipment item is not suitable within 10 days of delivery, you can return it to us for a replacement or refund. Returns must be unused and in their original, undamaged packaging.
Some items are excluded from our money back guarantee, including:
• Computer software that has been unsealed or registered
• Any item that comes directly into contact with the nose, ears or mouth
To arrange a return, just contact our customer service department on 020 7424 2800 or email us at firstname.lastname@example.org