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Hey there, hopefully you have time to help a brother out. I picked you after some careful reading on sound quality, etc. I've got an 08 TL-S, with nav of course. I was looking at using an alpine pxa h-800 with the controller to feed my amps. I need a signal from the factory radio ( first time I've ever considered using the factory radio because of sound quality ) My main reason is to keep the stock look, use the nav, with voice promts coming out of the center speaker. Will I need to increase the voltage coming from the HU? I'd like to get the best possible sound quality using the stock HU. Am I wasting my time trying to keep the stock look when the outcome will not be the sound quality that I know is attainable in a car?