Used MXR M66S Classic Overdrive Effect Pedal

Push your tone with this used MXR M66S Classic Overdrive, a compact stompbox that delivers warm, amp-like drive from subtle grit to singing sustain. In good condition and built for the road, it features straightforward Gain, Tone, and Output controls for quick dialing on any rig. Runs on a 9V battery or standard 9V DC adapter, with true bypass switching for a clean signal when off—perfect for blues, rock, and beyond.