Description
Every bassist knows the fight between punch and consistency — hit a note hard and it jumps out, back off and it disappears in the mix. The MXR M87 Bass Compressor is built to end that fight without stealing your tone in the process. Instead of a single “squash” knob, you get full command over attack, release, ratio, input, and output, so you can shape exactly how the compression grabs and lets go of your signal.
What sets the M87 apart is MXR’s Constant Headroom Technology, which keeps things clean and open even when you’re digging in hard on a slap passage or laying into a heavy groove. The compression works with your bass, not against it, so the character that makes your instrument sound like *you* stays intact through the loudest, most dynamic parts of the set.
Dialing it in is straightforward thanks to ten gain-reduction LEDs across the top, giving you a clear visual read on threshold and how much squeeze you’re actually applying — no guesswork, even under stage lights. True bypass keeps your signal path honest when the pedal’s off, and the tough aluminum housing is built to survive van rides and load-in abuse while still fitting comfortably on a crowded board.
This unit is used and in playable, road-ready condition.
- CHT Constant Headroom Technology for clean, transparent compression
- True bypass switching
- 10 gain-reduction status LEDs
- Attack, release, ratio, input, and output controls
- Lightweight aluminum housing, pedalboard-friendly footprint
- 1 x Instrument input, 1 x 1/4″ output
- Runs on 1 x 9V battery (power supply not included)
- 2.5″ H x 5.5″ D x 4.5″ W, 0.84 lbs.
- Manufacturer Part Number: M87









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