Used MXR M133 Micro Amp Pre Effect Pedal

Looking to add clean, transparent gain to your signal? This used MXR M133 Micro Amp Pre Effect Pedal is in excellent condition and ready to boost your tone. Featuring a single Gain knob, it delivers up to +26dB of gain—perfect for spotlighting solos, balancing guitar levels, or pushing your amp into natural overdrive. Whether you're compensating for signal loss or enhancing dynamics, the M133 does it with simplicity and clarity. Ruggedly built with true bypass switching and powered by either a 9V battery or standard AC adapter (not included), it’s a versatile addition to any pedalboard.