The electronic part RAM-20.401/K with Speaker adapter; 130mm; Audi A4 front doors; Audi A4 1994->2001 manufactured by Carmedia is an aftermarket automotive audio speaker adapter designed to fit the 130mm front door speakers of the Audi A4 which was manufactured between 1994-2001. The speaker adapter is manufactured by Carmedia and works in concert with their RAM-20.401/K speaker kit. It allows the installation of a high-quality aftermarket speaker system in the Audi A4, and offers improved audio quality over the factory speakers.