Amazon.com: NuIth Add an Amplifier Subwoofer Interface Adapter for VW 2004-2015, BMW 3/5, Audi 2002-2010 to Factory OEM Radio Stereo 2 Channel RCA Line Output Converter Kit : Electronics
Auto Bass Gehäuse für VW Golf 5 und 6 Variant + 25cm Subwoofer Hertz , 289,00 €
Golf V - subwoofer - YouTube
Subwoofer/Amp install on Mk5 Rabbit, GTI, Golf and Jetta - YouTube
MB Quart QB-250 Golf V Active Box 25cm Active Custom Subwoofer Box QB250 Golf V! | eBay
Blade ICE - VW Golf MK5 speaker retrofit from Gladen Audio. This kit also works in Porsche 911's. ONE 200 Golf 5 Plug & Play 3-way System for VW 25 mm silk