This Crux CBC1 Bass Control Knob/Subwoofer Fader is the perfect addition to your car audio system. Designed for use with stereo RCA inputs, this knob offers precise control over your subwoofer and bass levels. With a sleek and durable design, it is sure to last for years to come. Whether you are a music lover or a casual listener, this knob is a must-have for anyone who wants to enhance their car audio experience. It is compatible with a wide range of car models and is easy to install, making it a great choice for anyone looking to upgrade their audio system.