Check the listing for details. MXR M-132 Super Comp Compressor w/ 9v power supply. Condition: New. Listed at 119.99 USD. MXR M-132 Super Comp Compressor w/ 9v power supply The MXR M-132 Super Comp. Includes a free 9v power supply! FREE shipping anywhere in the USA! Countless pros rely on the original Dyna Comp to give them the edge in the studio an on stage. Now, the updated Super Comp takes your playing even further, providing an invisible boost to intricate licks, juicing up your sound, and helping you "lock in" like never before. Output and sensitivity knobs let you dial in the perfect setting to keep your parts where they belong in the mix. The new attack level control ensures that initial bite and chunk are never squashed, so you can run the hottest pickups and still hear your dynamics. Create the tight, percussive guitar sound that drives thousands of pop and country hits or add endless, tone-sweetening sustain to your leads. Power: Single 9 volt battery or Dunlop ECB-003 AC adapter Controls: - Footswitch toggles Effect On/Bypass - Output knob sets compressed (attenuated) output level - Attack Level knob sets the attack attenuation level (highest attack level is minimum attack attenuation) - Sensitivity knob sets the compression ratio (highest sensitivity is maximum compression) Video courtesy of Dunlop Manufacturing