JBL RBC Rotary volume control volume control

Wired Remote, Rotary, Black Control your subwoofer
The RBC is an optional wired remote volume control for the BASSPRO SL subwoofer that allows easy adjustments of the bass/subwoofer levels from the vehicle’s front seat. The remote bass control is simple to connect to the BASSPRO SL subwoofer amplifier via a telephone-style plug jack, and can be mounted in a variety of positions to suit your specific vehicle and preferences.