Whirlwind Director Direct Box with Ground LiftThis converts an unbalanced line, instrument or speaker level signal to low impedance balanced mic level. Features: 1 4 parallel wired in out jacksGround Lift switch to help eliminate hum and buzz30dB pad switch for selecting between line instrument or speaker level input signalsSwitchable high cut filter to eliminate amplifier noise Uses Whirlwind's TRHL M transformer with metal shield that's riveted, not glued, to the chassis Aesthetics Flat Black.