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The “black sheep“ of the 9-Series, the Maxon SD-9 Sonic Distortion pedal offers the best characteristics of transistor and op-amp circuits in one compact unit. The SD9 has unique Low Boost/Hi Boost Tone control that offers more low-end beef than other effect pedals, while its Distortion and Output controls can provide up to 55 dB of gain boost. At low gain settings the Maxon SD-9 functions perfectly as a full-frequency
