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2003 was the year that Porsche switched to the MOST system (fiberoptic bus from head unit to the factory amp.) So, it's not as simple as just swapping in a new head unit, you'll have to rewire the speakers directly to the new head unit and you'll lose the factory amp and cd player if equipped. That of course, won't sound as good as the factory setup, because the amp in an aftermarket radio just isn't as good as the standalone amp.
If you really want to go this route, expect to replace the head unit AND the factory amplifier. You can then rewire the factory speakers to the new amp, but if you're doing all that, might as well replace the Bose speakers (if equipped) while you are at it.
2003 was the year that Porsche switched to the MOST system (fiberoptic bus from head unit to the factory amp.) So, it's not as simple as just swapping in a new head unit, you'll have to rewire the speakers directly to the new head unit and you'll lose the factory amp and cd player if equipped. That of course, won't sound as good as the factory setup, because the amp in an aftermarket radio just isn't as good as the standalone amp.
If you really want to go this route, expect to replace the head unit AND the factory amplifier. You can then rewire the factory speakers to the new amp, but if you're doing all that, might as well replace the Bose speakers (if equipped) while you are at it.
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