Used MXR M133 Micro Amp Pre Effect Pedal

Boost your signal with the Used MXR M133 Micro Amp, offering up to +26dB of clean gain in a compact, pedalboard-friendly design. Perfect for solos, switching guitars, or pushing your amp harder, this preamp pedal is in excellent condition and delivers consistent, noise-free performance. Powered by a 9V battery or adapter (not included), the M133 features rugged construction and simple, one-knob control to dial in the perfect level boost with ease.