The most iconic compression sound in music history, tweaked and tuned just for bass players. Built around the classic CA3080 "metal can" integrated circuit for its quiet operation, superior transparency and increased dynamic range, this pedal comes with all the controls you need to shape your compressed sound in no time at all. The clean control lets you add in your unaffected bass signal to maintain low end integrity, while the tone control adjusts the upper mid range to retain the tonal dynamics of your bass. Output and sensitivity controls set volume level and the length of sustain, while the attack switch toggles between a vintage style slow attack time and a modern style fast attack time. All this comes in an MXR mini housing, so making room for it on your pedal board will be a cinch. True hardwire bypass. Cannot be powered by a battery. Supplied with 9 volt AC adaptor (ECB003).