Rockford Fosgate Punch 160.4 160watt Amp Amplifier Car Stereo Old School

You can get the following XCards from yourAuthorized Rockford Fosgate Dealer.XM50 = 50Hz XM70 = 70Hz XM100 = 100Hz XM150 = 150Hz XM200 = 200Hz XM275 = 275HzXM400 = 400HzXM4.5k = 4,500HzXM6.5k = 6,500HzXM00 = Blank card forcustom crossover.

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