i wanted to swap mine out too, but i also just went with the oem wiring. when i replaced the head unit i spliced into the existing wires behind the dash. worked just fine. then, a few months ago i added a power amp. i just ran new wires from the amp output up to the splices. still works fine.
btw, if you go the outboard amp route, get one with a high-pass filter. i have mine set at 80 Hz. that unloads the door speakers a lot, since they dont have to try to push any bass. you will, of course, need a seperate sub to handle the bottom end...
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2000 Silver MT Insight
WAI, HTR200, Kenwood MP3 head unit, 3 MTX stealth subs, very-high-mounted 4th brakelight, yellow-top, tinted, SG2, MIMA, center armrest.
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