The MXR M87 Bass Compressor packs rackmount-quality dynamics processing into a durable, lightweight stompbox. You get all the familiar controls you'd find in a recording studio — Attack, Release, Ratio, Input, and Output — enabling you to achieve everything from invisible peak limiting to full-bore squash. The M87's Constant Headroom Technology (CHT) guarantees maximum headroom and clarity, permitting your bass's full dynamic range right up to the compressor's threshold. The bassists here at Sweetwater appreciate this pedal's 10-segment LED gain-reduction meter, which makes dialing in your sound as easy as 1-2-3. True bypass switching rounds out this must-have bass effects pedal. Players who demand studio-level compression onstage will love everything about the M87 Bass Compressor — no rack required.