aftermarket reciever ? stock amp?

fivespeedsteed said:

so my car has the stock 85 watt amplifier. if i get an aftermarket reciever, i know i will need the wiring harness, the instillation kit, but how do i wire it to the amp? do i have to bypass the amp.

my friend has a mach 460 and he had to do something simmilar when he got the 300 dollar alpine.

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