<h3>BLC-3 Universal Bass Remote Level Control Knob for Car Amplifiers</h3> <p>This unit allows the driver to remotely adjust the subwoofer level of amplifier to the main speaker system by simply connecting audio source into the RCA inputs and RCA outputs into an amplifier. It offers greater tuning flexibility for driver to adjust the bass level from the front seat while driving.</p> <ul> <li>Universal wired remote bass level control knob<br> </li> <li>Allows for bass level adjustment closer to the driver for convenience<br> </li> <li>Perfect for balancing the system to change music styles<br> </li> <li>Connects between the amplifier and stereo via RCA connectors<br> </li> <li>Works with most head unit / amplifier combinations<br> </li> <li>Easily mounts underneath a dash or other locations</li> </ul>