Hi, I have a Lexus SC400. . .1996 version. This car has factory amps and I've been told that i can't use these with any aftermarket system. I don't understand why not. It looks like it has pretty much the same type of connections that an aftermarket amp would (beit that they are in the form of wires and socket type plugs). It has constant 12v input, low level positive inputs and a signal ground, a ground wire, an igition 12v input, and remote input. I would appreciate it if someone could look at this schematic and see if you agree with these people. I like the factory amps and subwoofer as they are good, so I don't see spending that extra money if I don't need to. Thanks for any help!
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Utilize factory subwoofer and speaker amps