C55 HK system - anyone replace the stock sub utilizing the stock amp?
Super Member
Joined: Dec 2007
Posts: 587
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From: The Windy City
'02 C32, '10 135i M-Sport, '10 E63, '17 GLE63S
And something else I've been kicking around as well, is that the stock sub is free-air (or at least, someone made the decision to use it as free air). I wonder what would happen if we create a sealed air volume below the sub? It wouldn't be completely sealed since there's a foam gap that the sub mounts on to the rear sheetmetal deck, but it might change the sound, hopefully for the better.
MBWorld Fanatic!
Joined: Oct 2009
Posts: 2,510
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From: bay area, california
Aston Martin V8 Vantage
luckily my family owns the largest car stereo shop in nor cal. and i own a c55 so i'm here to help. one of our installers built me a fiberglass enclosure for 1 12" diamond audio hex pro and he removed the factory subwoofer so that it acts as a port for the sound to go to the cabin. pretty much putting any sort of aftermarket subwoofer system in your trunk (it's not like we have a small trunk so space shouldn't be an issue) would make the difference. it's a very large hassle removing the rear deck to take out the factory woofer, but it is worth it. putting any old 4 or 8 ohm subwoofer in replace of the factory one will not work correctly because they're not really free air subwoofers.
