_x000D_ _x000D_ Car Adjust Line Level Volume Control Knob Subwoofer Equalizer Bass controller This remote amplifier level control is used to adjust an amplifier's power level, stereo, equalizer or crossover volume form the dashboard or other remote locations. It adds sub-woofer level controls or balances a multiple amplifier installation. Fine tunes the volume of any RCA line level signal you wish to control. Compact housing allows the unit to be mounted virtually anywhere so control is at the users fingertips. Simple in and out connections, no additional wiring needed. Great for a sub amp volume control. Connect the RCA from the output of this Controller to the amplifier, and wire the car stereo output to the RCA input of this unit. Adds a Dash Mounted Sub-Woofer Volume Control 4 gold plated RCA's (2 RCA input & 2 RCA output) Level control knob Frequency 150Hz - 40Hz Gain 0db to -12db _x000D_ _x000D_ _x000D_