I'm upgrading the the factory premium radio to an aftermarket NAV/DVD/CD/USB Headunit. Crutchfield says the Premium Radio's Amplifier must be by-passed. Thus you must use the Lineouts to the output connections of disconnected amplifier outputs. Also you have to buy a separate amplifier to drive the free air sub in the rear deck. Has anyone been sucessful in using the factory amplifier using the new headunit Pre-outs or Line -outs?
I know in some cars this has been done with good results. (G35 w/BOSE amp)
I know in some cars this has been done with good results. (G35 w/BOSE amp)