Used BOSS SD1 Super Overdrive Keeley Mod Effect Pedal

Used BOSS SD-1 Super Overdrive with Keeley mod in Good condition, delivering smoother clipping, enhanced clarity, and richer sustain than a stock SD-1. Classic overdrive tone for blues, rock, and pushing tube amps, with responsive Level, Tone, and Drive controls. Standard compact BOSS enclosure with buffered bypass for strong signal integrity. Runs on 9V battery or optional 9V DC adapter, and features 1/4" input/output for easy pedalboard integration.