The Fluid Audio FC10S is a studio monitor subwoofer that provides solid and high definition bass in situations where a deep bass boost is needed in the studio. It features a standby foot switch that allows the output to be turned on and off by the pedal, two EQ modes that can be switched between flat response or heavy bass depending on your song, phase adjustment to match the monitor speaker, crossover frequency setting, and a ground lift switch to suppress the ham noise from external power supply.