Quote:
Originally Posted by Viffermike
The system turns on to emit 'car sounds' (chimes, ASD, etc.) whenever you enter the car; this is what you're hearing even when the stereo is 'turned off'. It is simply the noise floor of the system, which is accentuated when better speakers are installed that can reproduce the higher frequency 'hiss' of the system noise better. It is totally normal. The solution to this is installing an aftermarket amp with a quieter noise floor, or (only in Hi-Fi systems) an inline noise filter.
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With the stock speakers it is still making the noise though. Maybe I just didnt pay attention to it before. If that's the case, I shouldnt even bother going to the dealer. I had been considering the Bimmertech Amp which would solve my problems if what you are saying is correct, but if it isnt, and I spend the money on the Bimmertech Amp and still have the hiss/whistle then I'll be pretty unhappy.
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Current Vehicles: 2007 911 Turbo 6MT, 2011 335i Xdrive M Sport Coupe
Past Vehicles: 2014 Porsche Boxster S,1983 Porsche 911 "RSR", 2013 Audi S4, 2011 335i Xdrive M Sport Coupe, 2015 M235i, 2011 335i Xdrive Coupe, 2006 330i, 2012 WRX, 2011 Camaro V6, 2004 325Xi