Fatten up your tone and strrrrretch your sustain. The MXR M-132 M-132 Super Comp Compressor Pedal is an improved version of the legendary Dyna Comp. This is the guitar effects pedal that’s the ultimate source for the Nashville sound. Attack level control preserves initial volume without sacrificing sweet sustain. Sensitivity control lets you dial in just the right amount of compression. The Super Comp effects pedal has a super-tough housing with bypass footswitch and LED.