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MXR M133 Micro Amp Gain Boost Effects Pedal

MXR M133 Micro Amp Gain Boost Effects Pedal
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The MXR M133 Micro Amp Gain Boost Effects Pedal is here to make your playing louder, richer, and more dynamic. With an adjustable output level, it’s like having your own personal sound technician in tow, ready to get your tone pumping with a cheeky twist. 

The Micro Amp allows you to boost your signal with a preset amount of gain up to +26dB.

This pedal can be powered by a 9-volt battery, a Dunlop ECB003 9-volt adapter, or the DC Brick™, Iso-Brick™, and Mini Iso-Brick™ power supplies (not included).  

Get your sound up to 11 with the MXR M133 and turn up the fun!


Adding a preset amount of gain with just a single control, the Micro Amp is a great way to boost your signal for lead work or adjust between two different guitars with unmatched output (i.e. humbuckers to single-coils). It can also provide a permanent boost in a long effects chain where signal drop off is a problem.