PAC TURBO X 2X Line Driver with Bass Boost S/N ratio of 96 db for high quality sound Average draw is less than 15 milliamps Fixed signal output with a 12 dB bass boost This 2X line driver with bass boost works with most head units and amplifiers and it doubles your bass signal output Doubles your bass signal output 12-db bass boost doubles the signal output Works with most head unit and amplifier combinations