Subwoofer Bass Remote Volume Control Knob RCA Level Frequency Equalizer for Car Audio Amplifier Earbud Description: _x000D_ Used to adjust an amplifier's power level, stereo, equalizer or crossover volume form the dashboard or other remote locations _x000D_ Adds sub-woofer level controls or balances a multiple amplifier installation _x000D_ Compact housing allows the unit to be mounted anywhere so control is at the fingertips _x000D_ Simple in and out connections, no additional wiring needed _x000D_ 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 _x000D_ Great for a sub amp volume control _x000D_ Specification: _x000D_ Size: (approx.)80*70*40mm/ 3.15*2.76*1.57inch _x000D_ Adds a Mounted Sub-Woofer Volume Control _x000D_ 4 gold plated RCAs (2 RCA input & 2 RCA output) _x000D_ Level control knob _x000D_ Frequency 150Hz - 40Hz _x000D_ Gain 0db to -12db _x000D_ Package Includes: _x000D_ 1 x Audio Curcuit Noice Isolator _x000D_ _x000D_ _x000D_