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MXR

MXR® Bass Compressor

  • Based on 417 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Oct 11
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Features

  • CHT Constant Headroom Technology for clear, clean performance
  • True bypass
  • 10 gain-reduction status LEDs
  • Its CHT Constant Headroom Technology gives you plenty of headroom and clear performance
  • The totally transparent M87 Bass Compressor allows your full dynamic range to shine through until your signal reaches the compression threshold, which is indicated by the ten highly visible gain-reduction status LEDs
  • Model Number: M87

Description

Take your favorite studio compressor to the stage with the MXR Bass Compressor. A complete array of controls—Attack, Release, Ratio, Input, and Output—makes it easy to fine-tune your sound, from subtle peak limiting to hard squashed compression effects. Its CHT™ Constant Headroom Technology gives you plenty of headroom and clear performance. This totally transparent compressor allows your full dynamic range to shine through until your signal reaches the compression threshold, which is indicated by the ten, highly visible gain-reduction status LEDs. It's all packed into a durable, lightweight aluminum-housing pedal that's the size of a Phase 90.

Brand: MXR


Style: Bass,Compressor


Color: White


Product Dimensions: 2.6"L x 6"W x 4.4"H


Item Weight: 241 g


Voltage: 9 volts


Amperage: 2 milliamps


Audio Output Effects: Compression


Controls Type: Knob


Power Source: Corded Electric


Hardware Interface: 1/4-inch Audio


Signal Format: Analog


Style: Bass,Compressor


Color: White


Item Dimensions L x W x H: 2.6"L x 6"W x 4.4"H


Item Weight: 241 g


Item Dimensions: 2.6 x 5.5 x 4.4 inches


Connector Type: 1/4 inch (6.35mm) audio jack


Brand Name: MXR


Number of Items: 1


UPC: 710137050181


Global Trade Identification Number: 81


Included Components: MXR Bass Compressor Pedal


Manufacturer: Jim Dunlop


Model Name: 11087000001


Model Number: M87


Manufacturer Part Number: 11087000001


Warranty Description: Dunlop manufacturing, inc. Will repair or replace, at its discretion, defective workmanship or materials on all new dunlop electronics directly or through the selling dealer or authorized service technician, for one year from the date of purchase, at no cost to the original purchaser. Repair or replacement parts installed will then be warrantied for the unexpired portion of the original warranty term.


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Oct 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews

    • Very nice
I use it as a mild dynamic range compressor, it generally is on for the E string and sometimes the A. The effect is subtle, evens out the note volumes and adds a little to the sustain the way I have it dialed in. You can use a compressor for other things, but that's what I wanted it for. Another reviewer said a compressor on bass is better felt than heard, that's exactly right, it makes you seem like a better player, and makes it easier on the sound guys because your peak volume is more consistent. I had to front-end it with the MXR-M81 preamp since I have a passive bass. This pedal is not intended to be used as a preamp from what I can tell, it adds some hiss and doesn't have enough gain to be effective for that purpose, my bass couldn't even light up the lights on highest gain. But if you hit it with line-level inputs it shines. It appears to draw power from the moment you plug in to the input jack, turning on bypass does not appear to stop current draw like the tuner and preamp pedal do, so keep that in mind when you are figuring battery life. I learned this the hard way. A nice feature is when the battery dies it silently goes into bypass mode. A few of the LED lights stick on for a while as a low battery indicator, but it's already in bypass mode when you see that. My settings are 12:00 for input, output, and attack, 3:00 for release, and 4:1 ratio. My low E string hit hard will almost light up all the LEDS, the A string not so much, and the D and E hardly at all, so mostly it stops the E from overpowering the rest of the strings. When played softly I don't hit the limit so my soft dynamic range is still accessible for expressiveness o soft parts, and cleans me up a bit on the loud ones. I love this pedal and won't play without it now. Wish I had bought it years ago. ... show more
Reviewed in the United States on January 18, 2016 by K. Hutchison
    • Happy with my m87
Bass compression is a subtle tool/effect that is easily misunderstood, misused, and underrated. After lots of time debating the hundreds of compressors out there, I decided on this one for 4 things: 1) Functionality - the kind of controls that you get here aren't usually found at this price. The LED metering is great and lets you know how much input to dial in, I only know of a couple other that do this, and they go for $250+. 2) Ease of use - the manual gets you up and running in minutes, but patience and more use will allow me to fully utilize this effect 3) Sound - fattens my tone like a compressor should, but will also work as a limiter when the situation calls for it. 4) Reliability in the manufacturer - I've heard about a number of these not turning on, not responding to inputs, hissing, etc. For my money, I wanted peace of mind in a trusted brand like MXR. P.S. While the manual won't tell you, this pedal will also accept higher voltages, and I run mine through my 18V voodoo. I'l put a picture up soon. ... show more
Reviewed in the United States on October 9, 2012 by JBug
    • Solid, great unit
I needed a compressor for a gig. The reviews for this were good so I gave it a shot, glad I did. Very pleased with the adjustability, the build quality, the sound quality. This is now a pedal that will go everywhere with me.
Reviewed in the United States on August 21, 2023 by Desert Customer
    • Best in the Biz
If pro recording artists trade in their racks for the simplicity of the StompBox Compressor...thats good enough for me!!! Compact design with enormus properties, LED work well even with passive bass...if you cant get your LEDs to light up on a PBass your pickus suck...Ive played with many passisves and as you begin to upgrade and the pick ups gain in quality the LEDs follow. If your looking for a Bass Compressor, stop wasting time and money, buy this pedal...shure your can go boutique and drop +$500 but i have yet to hear any boutique that can outdo the MXR M87 Keep makin em MXR...I'll keep buyin em ... show more
Reviewed in the United States on September 10, 2013 by William McKinnis
    • Essential pedal for any bassist
I don't know why I waited so long to pick one of these up! I've heard that the compressor can really help dial in tone and i can't believe how much of difference this pedal made. Now this isn't going to be a in your face difference like fuzz or octave, but you will notice the difference. Highly recommend to anyone thinking they may need it, you won't regret it ... show more
Reviewed in the United States on December 29, 2025 by arron steadman
    • Super
Super
Reviewed in the United States on April 9, 2026 by Mauricio Diaz
    • Great device.
The M87 has a quite a few features that the others do not have. The first noticeable difference is the LED meter. While this is almost common nowadays on rack mounted compressors, it is not on pedals. I found the meter to be quite helpful in adjusting the input and output controls, along with the release, attack, and ratio adjustments needed to get the performance out of the pedal that I wanted. Another great feature of the M87 is the input and output ratio. I was able to adjust my input at a higher level, and keep the output at a lower level to give a more balanced and level sound for the different styles and techniques used. The M87 also has a foot switch that allows you to have the pedal on, or in true bypass mode with a blue light as an indicator to let you know which mode is currently functioning. The M87 can be powered with one 9 volt battery or with an adapter/power supply. The housing is small and durable. Everything is detailed to read in an easy way and this device is a powerhouse that everyone should have in their lineup. The instructions that came with the M87 are very thorough, which makes it easier for those that may not yet fully understand the aspects and effect that a compressor can have on your sound. ... show more
Reviewed in the United States on January 20, 2014 by Jose Roberto
    • One the best studio quality compressor for your bass
I'm satisfied with this purchase...
Reviewed in the United States on September 14, 2025 by Mark Anthony DC Santos

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