M87 BASS COMPRESSOR DESCRIPTION POWER • Classic studio compressor in a Phase 90-sized pedal • CHT™ Constant Headroom Technology for clear, clean performance • Ten Gain Reduction status LEDs • True bypass The MXR Bass Compressor is powered by one 9-volt battery (remove bottom plate to install), a 9-volt AC adapter such as the Dunlop ECB003/ECB003E, or a DC Brick™ power supply.
