MXR M87 Bass Compressor Effect Pedal - Used AC61121 which shifts the bridge position

which shifts the bridge position closer to the center of the lower bout

With the Universal Audio OX

The original model of 1961-1975 has provided distinctively voiced low end for everyone from the Beatles to the Black Keys

A faithful reissue of the original classic circa 1978

MXR M87 Bass Compressor Effect Pedal - Used AC61121 which shifts the bridge positionThe MXR M87 Bass Compressor offers bass players plenty of control over their sound with the helpful addition of a gain reduction indicator so you can see exactly how much the pedal is squashing your signal. MXR's patented "Constant Headroom Technology" helps to keep your signal clear and transparent. This particular M87 Bass Compressor was not even used and comes with the original box.