MXR M-133 Micro Amp



This device adds a preset amount of gain, using a single control. With a guitar, this lets you boost your signal for lead work, adjust between two different guitars with unmatched output (i.e., humbucker to single coils), or it can supply a permanent boost in a long effects chain where signal drop off is a problem.

Power: Single 9 volt battery or Dunlop ECB-003 AC adapter

Controls: Footswitch toggles amp on/bypass (red LED indicates on) Gain knob adjusts total output volume when micro amp is engaged

  • 4-3/8" x 2-3/8" x 1-1/4"
  • 0.9 lbs.
  • White


myFXDB user reviews

1 review, average score of 8 / 10

2015-07-30wakan7778/10  ......

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