Musical compression and clean boost! Our Double Classic Comp pedal has a natural sound and is very musical – much like high-end rack mounted compressors found in professional studios. Adjust the Ratio setting from moderate to heavy compression, create a very effective clean boost, or boost your amp from subtle to full overdrive [with just a few turns of the control knobs]. Using the same compressor circuit from our Joe Walsh Double Classic pedal, this pedal is acclaimed by players far and wide.