Ok, so I have a 2004 g35 4 door. I'm going to change out the stock deck, but haven't figured out which deck I'm going with. What I'm wondering is, what do I do with the amp thats built into the car from the factory? Do I have to disconnect the speakers from it and run new wires? What did you guys do?

Thanks

 

get an aftermarket amp, run rcas from new deck's preamp outs to trunk where aftermarket amp will be. Use stock speaker wires going out from old amp as your speaker output wires on new amp. done.

 

cool, so theres probably a diagram online telling me which wires are which?

 

yes sir, i believe there are copies of the manuals in the DIY section

 

http://www.digitalwheelz.com/diy

 

thanks for the help guys