sound system. Basically I just bought the metra wiring harness and wired it through that. A set of RCA's feed into the metra harness to go to the factory mid's and a lower power 4ch aftermarket amp feeds the factory high's. The stock head unit originaly powered the highs which is why I needed an aftermarket amp to power them. The way I currently have it is less than optimal because of the several y-splitters I had to use since i'm using the onboard sound. I'm happy with it for now though. I'm not an audiophile, so as long as it doesn't sound worse than it did stock, i'm happy. I would like to improve on the sound quality, but I also don't want to have to find places to mount amps and such. If I could find quality amps that would fit in the stock location, that would be awesome, but unfortunately good quality amps tend to be rather large. These days even a 2-channel 50w amp is enormous.