The MXR M102 Dyna Comp is a handy in-line compressor for electric guitar and bass that has become an industry standard on countless Nashville studio pedalboards thanks to straightforward operation and top-notch sonic results. Accordingly, the Sensitivity knob determines the sensitivity of the great compressor circuitry, so every note rings out of the speaker with percussive attack and smoothed dynamics. In addition, the MXR M102 Dyna Comp helps extend the sustain of overdrive sounds.