Used MXR M133 Micro Amp Pre Effect Pedal

Boost your signal with this used MXR M133 Micro Amp, a compact preamp pedal in Good condition. Featuring a single gain control, this pedal delivers up to +26dB of clean boost—ideal for solos or balancing guitars with different output levels. Its all-analog circuitry preserves your tone, while the rugged metal housing ensures reliability on stage or in the studio. Powered by 9V battery or adapter (not included), this classic pedal remains a favorite among pros.