Mk7 GOLF/GTI HIDDEN SUBWOOFER (Updated with Demo) - YouTube
VW Retrofit LTD - Golf MK7 TDI upgraded with Helix subwoofer kit. 2h ish job including fitting and programming sound parameters. Quite good results from such a small box 😊 | Facebook
Volkswagen Plug and Play sound system illustrated
Subwoofer installieren im VW Golf 7 | Tutorial | ARS24 on Vimeo