AUX In is the worse source in audio quality in the NBT - it does two conversions: AD and then DA. USB does one conversion: DA. And can play lossless direct. And charge your phone.
But if you are happy then that is what matters - to you. For everybody else, just use lossless with the USB already there.
Quote:
Originally Posted by BEM-S4
The DAC in the head unit is crap - the only option is to feed the highest quality analog signal possible into Aux-In. Using USB in means the car is converting to analog.
The other choice would be to go direct into aftermarket amp via USB but again that will not charge your phone so you still need an adapter. You don't want the car or your phone handling the digital to analog conversion neither has a quality processor.
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