OK so far Ive replaced my head unit for use of my iPod. Used a wiring harness to connect to stock amps. Ive added a pair of subs and amp, and just replaced the rear 5x7/6x8's with some 3 ways and an amp. Now I am thinking of replacing the front high range 2.5" speakers with some 1" tweeters I have already. Now can I just plug these into the factory wiring or will they sound awful? I would rather not run new wiring and have to buy another amp.