Stereo install

Ok so I have a 2019 mustang EcoBoost premium. I want to use the factory head unit but I have 2 amps a 4 channel and a mono plus a LC7 how the heck do I wire this up because there is the factory amp and these cars are so finicky with the way everything is integrated

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I went with a "amp replacement module"
Rockford/Maestro DSR1
The alternative is you can get a low voltage pre amp signal from the radio before the amp
There is a huge thread with diagrams etc on mustang 6G.

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