B2 Audio Ref Four Bass Knob Controller with Level Voltage Temp & Clip Indicators 1500 Watts RMS Ideal for professional installation: Best

Ideal for professional installation: Best suited for a seamless rebuild when installed by a professional technician

this kit restores the Trinity H Series subwoofer to its intended power and clarity

5-Band Graphic Equalizer: Frequencies at 50 Hz

rear and sub outputs to aftermarket amplifiers with flexible matrix routing and advanced bass control

B2 Audio Ref Four Bass Knob Controller with Level Voltage Temp & Clip Indicators 1500 Watts RMS Ideal for professional installation: BestThe B2 Audio Ref Four Bass Knob Controller is the official external bass control built specifically for seamless integration with the Ref Four amplifier, delivering precise on the fly bass adjustment and real time monitoring for serious car audio installs. Level control knob: Level control knob for precise bass adjustment, allowing you to dial in bass presence without altering processor settings. Power Voltage selector switch: Power Voltage selector