Effect Pedals & Processors
MXR M 82 Bass Envelope Filter
MXR M 82 Bass Envelope Filter, Effect Pedal, For E-Bass, Classic Analog envelope filter sounds, True bypass, Controller for Dry, FX, Decay, Q and Sens.
https://www.bizrate.co.uk/effectpedals_processors/mxr-m-82-bass-envelope-oid1819709812.html