@cambridgecaraudio: Building a Custom Fiberglass Subwoofer Box for a Mercedes S63 AMG from Start to Finish. See the complete custom car audio fabrication process, from fiberglass molding and enclosure design to subwoofer installation and final fitment. This Mercedes S63 AMG receives a premium bass upgrade with a fully custom fiberglass subwoofer enclosure built for performance, sound quality, and factory-style integration. #MercedesS63 #S63AMG #mercedesbenz #CustomCarAudio #CarAudio #SubwooferBox #Fiberglass #fiberglassfabrication #CarAudioInstallation #caraudiofabrication #cambridgecaraudio