Maxon set the standard for overdrives with the OD808 — now they raise the bar with the OD820! Unique voltage-doubling circuitry offers increased headroom, yielding the smoothest, warmest, most transparent overdrive ever! The OD820's specially designed circuit reacts precisely to every picking nuance and playing dynamic, making any instrument or amplifier come alive! Features true bypass switching and 9-volt battery.

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