RTA Fabrication - Here's the stacked subwoofer/ amplifier rack installed in this VW Touran. There's an Audison Bit One HD, Hertz Mille Legend 10” subwoofer and Hertz Mille Power 4 and 5
VW CC Passat B6 B7 R36 Upgrade Speaker – SOUMATRIX
OEM Front Door Woofer Sackbut Subwoofer Bass Speaker for VW Golf 6 MK6 Passat CC B7 3CD 035 454A - AliExpress
Basser - VW TOURAN
VW Touran EMMA Training Car OEM – EMMA Global
How to upgrade VW Touran speakers - YouTube
Audio System Xfit VW Touran 5t Evo2 Speaker for Volkswagen Touran 5T 2015-> | eBay