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      01-10-2011, 10:24 PM   #6
gadgetec's Avatar
Drives: 2008 E90 IB M3
Join Date: Mar 2008
Location: Pembroke Pines, Fl

Posts: 97
iTrader: (1)

I have the premium sound system, I had an amp lying around so it reduced my costs. I would estimate I spent $450. I think it is a good bang for the buck upgrade. You won't get the full spectrum of bass but it's leaps better compared to the stock subs. I still have not fine tuned the crossover and equalizer settings so once I do it will sound better than it already does.
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