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The JL Audio RBC-1 gives you convenient remote control over bass boost and input levels for compatible JL Audio amplifiers and powered subwoofers. Offering 0–12 dB of variable bass boost for A-Series and G-Series amps, it lets you tailor your low-end on the fly, while serving as the primary input level controller for RD-Series and mono JX-Series amps. With wide compatibility across A-, G-, RD-, Slash, e-Series, M-, JD-, JX-, HX/MHX/MX-Series, PowerWedge+, and MicroSub+ models, the RBC-1 delivers flexible, precise control for any system.
The JL Audio RBC-1 remote features an 18-foot cable for flexible installation in vehicles or marine setups, making it easy to mount on a dash, console, or panel. Its compact footprint (13/16" W × 13/16" H × 1-5/8" D) allows discreet placement, while included mounting hardware ensures a secure fit. As a genuine JL Audio accessory, it guarantees reliable operation and seamless integration with compatible JL Audio amplifiers and powered subwoofers.

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Very nice bass knob, I have this coupled with my JL500/1v2 and JL 10w7, and couldn't be any happier. This is a great price, and allows you to turn it up for rap or whatever you may listen to, and then turn it down to listen country, classical, etc.
Bought this when on sale also got free delivery what a bargain
Very convenient item and responds well with the JX500.1. Just make sure you place it close to you and where you are comfortable.
This bass control gives me so much freedom. Easy install too. Can now easily adjust the bass without getting distracted on the road.
This bass knob made my stereo life so much happier. Know I can turn my bass up and down to different toes of music when I want. I most definitely recommended this product to whoever likes to listen to different genre of music. Thank you car stereo
Had my JX1000.1 for months now and looking for a control that will work on it until i found the the RBC-1. It was an easy install from the start and it makes my life easier. Not that cheap for a remote control, but it does makes things easier so still no complaints about that.
Made my life easier. Used it for my 1000 watt JL amp and made things easier to adjust the volume as my ears hurts a little bit from all the bass. Good thing the knob is pretty close to me now.