Head unit upgrade help!
Im looking to change out my factory head unit, to maybe a pioneer DIN sized head unit. Now, my main question and concern is- I have the premium harmon/kardon sound set up with the business cd receiver, the 2 subs on the deck, and the trunk mounted amp. I would like to know if aftermarket units are compatible with the stock HK system (minus the head unit). Anyone have an aftermatket head unit with the factory subs and amp? Experience with this set up? I will eventually change out the subs and amp, but everything is money.
Any and all help is appreciated!