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Old 08-10-2009, 12:04 PM   #2
WFRFitness
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Join Date: Aug 2009
Location: Iowa
Posts: 195
My Ride: 2000 328CI E46
I have looked into this a little myself as I wanted a little more flexibility with my head unit your problem is this: the factory HK system runs on 2 ohms and 99% of the aftermarket head units/speakers are all 4 ohm. Basically if you want to change the head you have to do a TOTAL overhall of the system (speakers and amp) because the 4ohm head will not run with a 2ohm amplifier and speakers system.... long story short unless you are REALLY good with electronics and want to spend a lot of money. put the old stock HK head back in.
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