He'll have to run an RCA converter to from a set of the speakers in.

With all the rewiring and patching, sound quality degradation is immanent.




I'm still sticking with my initial suggestion of replacing the factory speakers, and going from there. In a perfect world, you'd want to match the HU's RMS to the speakers ... but for his needs, I'm sure he'll be fine if the HU is under powered a bit.

You'll notice a pretty large change in sound immediately. The stock speakers are made of a paper composite, new ones should be of a poly.