Add A Subwoofer Speaker Amplifier Adapter On Car Radio for Volkswagen VW Beetle 1998-2010

Features: 1、2 Channels RCA output, convert the high-voltage signal output of the amplifier or speaker to the low-voltage signal. Improve the sound quality. 2、Provide the remote level gain adjustment. You can adjust the bass down with the adjustment rotate button without having to pull over and manually adjust the amplifier. Selected 0V/ 1V/ 2V. 3、Used to add an amp or sub to your factory system. Upgrade your factory radio by installing an amplifier. 4、Comes with an inline converter. Fully adjustable gain control. Plug and play feature. Fitment: Volkswagen:  Volkswagen Jetta 1980-2001 Volkswagen Passat 1990-2001 Volkswagen Golf 1986-2002 Volkswagen Quantum 1986-1988 Volkswagen Scirocco 1986-1987 Volkswagen Vanagon 1986-1991 Volkswagen Fox 1987-1993 Volkswagen Corrado 1990-1993 Volkswagen EuroVan 1993-2003 Volkswagen Cabrio 1995-2002 Volkswagen Beetle 1998-2010   Audi: Audi 80 1988-1992 Audi 90 1988 Audi 100 1989-1994 Audi 200 1989-1991 Audi Coupe Quattro 1990-1991 Audi V8 1990-1994