Used MXR M66S Classic Overdrive Effect Pedal

Add rich, warm tone to your rig with this used MXR M66S Classic Overdrive pedal, in great condition and fully functional. Featuring true bypass switching, simple Gain, Tone, and Output controls, and a classic circuit design, it offers smooth overdrive that enhances solos and rhythms alike. Built into a rugged metal housing, the M66S delivers vintage-inspired sound in a compact, pedalboard-friendly size—perfect for blues, rock, and classic tone seekers.