Dunlop MXR M87 Bass Compressor Pedal

SKU:BBG 1650


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Take your favorite studio compressor to the stage with the MXR M87 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. 

Its all packed into a durable, lightweight aluminum-housing pedal thats the size of a Phase 90. 
  • CHT Constant Headroom Technology for clear, clean performance.
  • True bypass.
  • Ten gain-reduction status LEDs.


Input Impedance: 1 MΩ
Output Impedance: 600 Ω

Max Input Level: +14 dBV
Max Output Level: +8.5 dBV

Frequency Response: 20 Hz to 20 kHz, +/- 1 dB
Signal to Noise Ratio*: > 90 dBV
Total Harmonic Distortion**: > 0.5%
Gain: 31 dB

Compression Ratio: 4:1, 8:1, 12:1, 20:1

Attack Time: 20 μs to 800 μs
Release Time: 50 ms to 1.1 s

Bypass: True Hardwire

Current Draw
LEDs off: 14 mA
LEDs on: 19 mA
Power Supply: DC 9 volt

Housing Material: Aluminum
Housing Dimensions: 4-3/4 x 2-3/4 x 1-9/32
Weight: 8.4oz.

0 dBV = 1Vrms 
*A-Weighted, all controls at mid position 
**20 dB gain reduction, 1.1 s release setting, 50 Hz to 20 kHz


Rate and Review this item
Verified Buyer
MXR Bass Compressor
By Steve Doner
Very good compressor and good value. Very quiet which is critical for me since I keep it turned on 100% of the time, even at home. Sits on top of my amp for easy adjustment. The LED's make it easy to quickly tweak the input sensitivity - helps a lot when switching from passive to active basses.