Alpine Remote Subwoofer Bass Level Control Knob With 16 Ft Cable RUX-KNOB.2Conveniently adjust bass level from the cabin of your car with the Alpine RUX-KNOB.2 remote control knob. This is a useful dial when you want a little less bass in your music or when you want to listen more discretely. The included 16.4-foot connection cable makes installation an easy plug-and-play process, and it gives you enough length to reach the driver's seat. With 20dB of linear adjustment range, you can fine-tune your sound levels without compromising any quality. See below for details and specifications.Features and Specifications:• Control Gain/Bass Volume From Driver's Seat• Included 16.4 Ft Connection Cable For Easy Installation• 20dB Of Linear Adjustment Range• Compatible With: MRV-M1200, Mrv-M500, MRV-M250, PWA-S10V, KTP-190U, MRX-M50, MRX-M100, MRX-V60, PDX-M12, PDX-M6, PDR-M65, PDR-V75, PDX-V9, X-A70F (3 Channel Mode), X-A90V, and X-A90M• Multi-Amp Capable With Phone Cable Splitter (Sold Separately)