When receiving calls via BT or listening to audio from my iPhone 6+ from my Scion FR-S, (base, non-touch Pioneer system) I've noticed the sound to be a bit sub-bar. Calls, music and navigation directions sound much clearer coming from my friend's Nissan Rogue's BT system. Audio coming from other sources (USB, Aux, HD Radio) from my car's stereo sound great though. Is there an issue with the iPhone's BT and certain car stereos?
