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MXR M233 Micro Amp Plus Clean Boost Pedal

Clean Boost Guitar Pedal with Low-noise Op-amps, 2-band EQ, and True-bypass Switching
10 Write review Item ID: MicroAmpPlus
$139.99

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Micro Amp Plus - Clean Boost with Patch Cables

$154.98 $148.00

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MXR M233 Micro Amp Plus Clean Boost Pedal
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Clean Boost: Your Secret Weapon

Long a cherished secret weapon of tone-savvy pro guitarists, clean boost lets you always be at the right volume and sweeten your tone by hitting the front end of your tube amp just so. Put the MXR Micro Amp Plus on your pedalboard alongside killer overdrive, delay, and phase/flange pedals, and you've the sonic versatility for stage and studio domination. To create the Micro Amp Plus, MXR took its successful Micro Amp - a staple for many Sweetwater guitarists - and juiced it with specially-tuned 2-band EQ, true-bypass switching, and low-noise op-amps that keep your signal clean, even with boost cranked. The MXR Micro Amp Plus: consider it essential kit.

MXR Micro Amp Plus Features at a Glance:
  • Always be at the right volume for solos and rhythm parts
  • Sweeten your tone by driving the front end of your tube amp just right
  • Specially-tuned 2-band EQ lets you shape your signature sound
  • Low-noise op-amps keep your signal clean, even with boost cranked
  • True-bypass switching
Sweeten your tone and hit your amp just right, with the MXR Micro Amp Plus!

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Tech Specs

  • Pedal Type: Boost
  • Analog/Digital: Analog
  • Inputs: 1 x 1/4"
  • Outputs: 1 x 1/4"
  • Bypass Switching: True Hardwire
  • Power Source: 9V DC power supply (sold separately)
  • Power Usage: 6.5mA
  • Batteries: 1 x 9V
  • Height: 2.12" (including knobs)
  • Width: 2.62" (including jacks)
  • Depth: 4.37"
  • Weight: 0.54 lbs.
  • Manufacturer Part Number: M233

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Customer Reviews

4.6 out of 5

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My Favorite Boost Pedal!

This is a killer boost pedal! What makes it stank out is the EQ section, it makes all the difference! Clean boosts boost all frequencies, bass, mid and treble, there are situations where this can be a bad thing. I use a clean boost after the preamp as a volume boost for leads which works great, but boosting the full range of guitar frequencies in the scenario makes any muddy or harsh frequencies stick out too. The flexible EQ on this pedal fixes that issue, that's why I love it, it's the perfect boost pedal, plenty loud and great tone IMO!
by James D. from Wisconsin on
Music background: 32-year guitarist

Clean boost, adds clarify, nice EQ option

Very happy with this clean boost, adds flexibility and control plus a nice tonal EQ option that just works as it should. Simple, effective, game changer for an analog pedalboard.
by Adam White from Soquel, CA on

MXR MICRO AMP

Excellent, working with all kind amplifier.
by Guy Bisserette from New york, NY on

One of the best ever!

This boost is one of the greatest boost designs ever conceived. The EQ makes this boost a champ in any spot in the signal chain. Easy to use and great tone, it can push pedals or amps into distortion or boost volume with ease, worth every penny.
by Sweetwater Customer on
Music background: 29 year guitar player, tone chaser & pedal fanatic.

You don’t know what you’re missing

Great pedal with multiple uses! Here's what I found:

-Front end clean channel: incredible amount of volume boost while gradually pushing the preamp tube into clipping. It's fun to find that sweet spot where you have a little bite/grit. Great for RHCP-like cleans. Even at lower gain settings, it adds a sort of fullness to the sound.

-Front end overdrive channel: works as an amazing gain boost. It does not color the tone at all! This pedal is a perfect choice if you are tired of OD/Distortion pedals that always warp your tone…
Of course you can add/remove treble and bass if needed to get a perfect sound dialed in. Set your amp to a classic AC/DC crunch and then engage the pedal to open up a thick lead sound for solos.

-Through back end/effects loop- seems to mostly add volume rather than gain to both channels. Perfect if you want to have a louder preset volume for lead breaks/solos while playing in a band.

A pedal every rocker should own!
by Mike on
See also: Distortion/Overdrive, MXR, MXR Distortion, Overdrive, Boost & Fuzz Pedals
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