Mk7 GOLF/GTI HIDDEN SUBWOOFER (Updated with Demo) - YouTube
VW GOLF MK7 12+ NEW STEALTH SUB SPEAKER ENCLOSURE BOX SOUND BASS CAR AUDIO 10 | eBay
Alpine - SPC-600G7 Subwoofer System for VW Golf 7, Golf 6 and others
Helix Sound package for Mk7/Mk7 5 Golf - Supply and Fit -
VW GOLF MK 5 & 6 12" STEALTH SUB SPEAKER ENCLOSURE BOX BASS AUDIO UPGRADE CAR | eBay
Installed a spare tire subwoofer in my GTI : r/GolfGTI
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
Adding Under Seat Subwoofer - Thoughts? | VW GTI MKVI Forum / VW Golf R Forum / VW Golf MKVI Forum / VW GTI Forum - Golfmk6.com
Golf MK5 / MK6 Underfloor Sub Box
VOLKSWAGEN RABBIT/GOLF/GTI/R32 SUB ENCLOSURE 10" Mk5 and Mk6 - SRQ Customs