MXR M87 Bass Compressor Pedal

Bass Compressor Pedal with Attack, Release, Ratio, Input, and Output Controls and Constant Headroom Technology
MXR M87 Bass Compressor Pedal image 1
MXR M87 Bass Compressor Pedal image 1
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MXR M87 Bass Compressor Pedal
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Studio Bass Compression - in a Pedal!

MXR's M87 Bass Compressor puts studio-grade bass compression right on your pedalboard! You'll love how the M87 puts you in complete command of compression functions, thanks to attack, release, ratio, input, and output controls. The built-in Constant Headroom Technology (CHT) ensures plenty of headroom. You want your bass to retain its character, even during the most energized moments. The M87's transparency never lets the compression compromise your sound. Ten easy-to-see gain-status LEDs let you know when the compression threshold has been reached. Take studio-quality bass tones to the stage, with the M87 Bass Compressor!

MXR M87 Bass Compressor Pedal Features:
  • CHT Constant Headroom Technology for clear, clean performance
  • True bypass
  • 10 gain-reduction status LEDs
  • Attack, release, ratio, input, and output controls
  • Lightweight, tough aluminum housing
  • Pedalboard-friendly footprint
MXR's M87 Bass Compressor pedal packs studio-quality bass compression into a very compact, road-tough pedal!

Additional Media

M87 Bass Compressor User Manual

Tech Specs

Pedal Type Bass Compressor
Inputs 1 x Instrument
Outputs 1 x 1/4"
Batteries 1 x 9V
Height 2.5"
Width 4.5"
Depth 5.5"
Weight 0.84 lbs.
Power Supply Included No
Manufacturer Part Number M87

Customer Reviews

Based on 17 reviews
Write your review

Love the meter!

I've used a few bass compressors. Most fall into two categories. Either I can't tell they are engaged (transparent) or they color the tone more than I'd like. Much of these two things are cause by one poor skill in using a compressor. It's a wonderful tool when used properly, but a total tone suck when used improperly. The MXR Bass Compressor has done something no other compressor has done. It's taught me how compression works through the use of the meter on top. Now, to all you pro players who are laughing at me now...go ahead....but we all have to learn somewhere. With only a few minutes of twisting the knobs, watching the meter, and listening...I was able to dial in exactly what I wanted. I was able to fatten the tone, take the spikes out, and provide the FOH guy a good, level, signal.

Awesomely Good

By far the best compression pedal I've owned. Like night and day between this and the Ashdown model I was using. Plenty of control for any type of playing style or passive/active basses. Brings out the high notes when slapping it and adds plenty of sustain when you want it. Clear meter in compact rugged case. Also love the Blue 'on' LED. Well worth the money. Can't go wrong with pedal!!!! Can't recommend it enough. Stop debating and purchase it !!!!!!
Music background: Hobbyist Guitar and Bass, Live Sound Tech

Great Piece!!

Now im compressed!!! ... and its awesome!! Its amazing having all the control of the attack and release times!! im really amazed with the results. I have 3 different bass guitars with different gains and i found useful to me, getting the signal matched with the rest of my gear

One of the best bass pedals to own

What's there to say - this thing has the reputation it does for a reason. You won't be disappointed. Arrived in great packaging in a very timely fashion. Nothing but thumbs up across the board.


Clean, transparent. Really brought out the tone of my bass. Am now able to play with a lighter touch.
Music background: Professional Bassist, recording engineer

Sweetwater Advice

Jared Kalish

I use a few elaborate rackmount compressors in my studio to record my bass and searched for a way to bring that same great sound to the stage. When I found the MXR M87 Bass Compressor, my search ended. You get all the control and quality of a rackmount unit in compact pedal form!
See also: Bass Effects, MXR, MXR Bass Guitar Pedals & Effects, MXR Compressors and EQ