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Comment: Minor cosmetic imperfection on front of item (less than 1/4"x1/4"). Item will come in original packaging. Packaging will be damaged.
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MXR M87 Bass Compressor

4.4 out of 5 stars 46 customer reviews
| 4 answered questions

Price: $189.99 & FREE Shipping. Details
Only 12 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
  • Model# M87
34 new 3 used from $150.01 1 refurbished from $175.00
$189.99 & FREE Shipping. Details Only 12 left in stock (more on the way). Ships from and sold by Amazon.com. Gift-wrap available.

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Product Description

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

Product Information

Item Weight 14.4 ounces
Product Dimensions 2.6 x 5.5 x 4.4 inches
Shipping Weight 14.4 ounces (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
ASIN B004LG72W8
Item model number 11087000001
Batteries 1 9V batteries required.
Customer Reviews
4.4 out of 5 stars 46 customer reviews

4.4 out of 5 stars
Best Sellers Rank #24,679 in Musical Instruments (See Top 100 in Musical Instruments)
#6,255 in Musical Instruments > Instrument Accessories > Guitar & Bass Accessories
Date first available at Amazon.com May 13, 2011

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Verified Purchase
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.
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Verified Purchase
This compressor has a good spread of features and LED metering lights. As far as I'm concerned that right there makes it easily one of the best pedal compressors on the market.

This is especially easy to use for those new to compression. The manual helps you get decent settings within 10 minutes. The metering lights let you know when the compression is kicking in and how much. Simple.

All this plus the build quality of an MXR pedal and their solid reputation for customer service.
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Verified Purchase
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.
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By Zero on January 20, 2014
Verified Purchase
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.
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Verified Purchase
I would rate this pedal at 4.5 if I could.
I gives my bass a really nice round sound.
I especially like the controls. You can control how much compression to get.
I've owned much more expensive compressors (like Effectrode), but I like this one the best.
It is very solidly built.
There is a light indicator at the top that allows you to see how much your signal is being compressed.
For some reason... With a passive bass, I need to put the input up to almost full before the light goes on.
Even with the light off, the M87 gives my bass a bright sound.
The MXR M87 is well worth the money.
If it broke I would buy it again.
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