My rear speakers were wired to the original head unit. When I upgraded to a Sony double din I ran the rear wires to the frunk and installed a 6x40w cabrio amp. I didn’t notice much difference and it was a hassle. So I think you’ll be fine running them to the head unit.
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2001 Boxster S | Triple Black | Stock 17s | Bilstein PSS9s | BAD Shifter | 6x40w Cabrio Amp | 986.2 muffler
"Sixty percent of the time, it works every time!"
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