Collection: Vehicle Audio Interfaces & Line Output Converters

Interfaces let you add aftermarket audio to modern vehicles without losing the features you use every day. They connect new amps or stereos to complex factory systems, keeping steering wheel controls, chimes and premium sound working. At Elite Auto Gear you can shop car audio interfaces from PAC Audio, including AmpPRO amplifier interfaces for Bose, Sony and B&O systems, plus line output converters that turn speaker-level signals into clean RCA outputs. They are the key to a clean, factory-friendly upgrade. Every order ships free.