2016 BMW 535i GT Sedan The single ARC Audio amplifier powered the entire system. The ARC Audio on-board processor was setup by our tuning experts. Adding some much needed bass was the JL Audio subwoofer system. A remote level control for the subwoofer was installed in a stealthy location. The intuitive GUI system allows for each source selection. Each monitor can display independent video sources. The thin monitor design doesn’t take up much room. The headrest monitors clamp to the headrest bars. The client’s passengers can enjoy numerous sources of video entertainment.