Home Car Music System I built this subwoofer box 9 years ago! What would I do differently today? I built this subwoofer box 9 years ago! What would I do differently today? Ezcaraudio Sep 28, 2024 comments off Tweet on Twitter Share on Facebook Pinterest Special Deals On Sony Car Music System Check out the Hub of Car Music System bandpass car audio car audio fabrication caraudiofabrication custom subwoofer fourth order sealed sixth order slot port sub box sub enclosure subwoofer box subwoofer enclosure t line transmission line vented