Add Amplifier Subwoofer Adapter ISO Converter Wiring Harness for Audi Volkswagen VW GTi Golf Jetta Passat 2004-2015

Compatible with Volkswagen add sub amp wiring interface: Cabrio 2002, CC 2009-2015, EOS 2007-2015, Golf 2002-2014, GLI 2002-2015, GTI 2003-2014, Jetta 1999-2015, Passat 2000-2015, Rabbit 2006-2009, Tiguan 2004-2015, Touareg 2004-2015. Replacement for BMW add sub amp wiring interface: 3 Series (w/out OEM Nav) 2002-2006, 5 Series 2002-2003, X5 (w/out OEM Nav) 2000-2006, Z4 2003-2011. Mercedes-Benz: Sprinter 2007-2010, Sprinter (w/out Radio Delete) 2011-2015. Fit for Audi add sub amp wiring interface: A3 2006-2010, A4 (w/ Symphony Radio) 2002-2008, A4 2009-2011, A6 2000-2011, A8 2000, A8, Quattro 2001-2011, S4 2000-2008, S6 2000-2007, S8 2000-2010. Improve sound system. This amplifier subwoofer wiring adapter used to add amplifier or subwoofer for factory OEM radio system to upgrade the stock audio on some VW Audi vehicles. Only works with OEM factory non-amplified systems (no JBL/Synthesis, Bose, etc.). RCA line output 2-channel converter to provide an audio signal to an external ampli