Description
Every bassist knows the fight: too little compression and your notes jump around unpredictably, too much and you lose the growl that makes your instrument feel alive. The MXR M87 splits that difference with real studio-level control, built into a box tough enough to survive van rides and sketchy stages.
- Attack, release, ratio, input, and output knobs give you full command over how the compression behaves—slam it for slap tones or keep it subtle for fingerstyle grooves
- Constant Headroom Technology (CHT) keeps your signal clean and full even when you’re digging in hard, so the compressor never chokes your dynamics
- Ten gain-reduction LEDs show you exactly what’s happening in real time, no guessing whether you’ve crossed the threshold
- True bypass means the M87 stays out of the way when it’s off—no tonal residue, no signal loss
What you get is compression that tightens up your low end and evens out your attack without flattening the character that makes your bass sound like your bass. Whether you’re locking in with a drummer on a busy stage or trying to smooth out an inconsistent picking hand, the M87 handles it without sounding processed.
Housed in lightweight aluminum with a footprint that won’t hog space on a crowded board, it runs on a single 9V battery (power supply not included). Bring the control room to the stage—one stomp at a time.









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