yes you can upgrade w/out changing the headunit , with an amp. here's how u do it. behind ur factory unit, you'll find a million wires. Find out the ones that go to the front speakers and the ones that go to the rear speakers and mark them. what you'll want to do now is get aline converters(around $20 buck s a piece at Bestbuy or 10 bucks on ebay). Attach the line converter to the speaker wires. Now you'll have RCA Pre-Outs that can go into your amp.(you migiht have to run one converter for hte front and one for the back, i'm not 100% sure, check to see if ur amp has inputs for front/back). Once you attach the converter u can run the RCA cable to ur amp. run some new speaker cables and pop in new speakers and ur set. I suggest u buy speakers fromb est buy and get their warranty. they'll cover ur speakers even if u blow them out.Originally posted by thechickencow
I'm considering upgrading my speakers in my 02 WRX since I can barely hear it with the windows open driving over 60mph. It definitely doesn't have the clairity and power behind it that I'm looking for.
My question is:
Can I just upgrade the speakers without changing the head unit? Can I put an amp(s) on the factory wrx headunit? I'm hoping to keep the stock head unit because I like the 6-disc in dash, but I'm doubting it has the power I'm looking for. I'd be happy with something with sound comparable to the Bose 50w x 4 system in my old maxima.