I am thinking of changing the speakers to something other than the crappy oem. Could this possibly screw up the ANC or maybe cause it to not work? I just had a second speaker (in the passenger side doors) go bad.They sounded lousey to begin with. I wish I had specifically ordered my Nox so I could have upgraded to the Bose or Pioneer. My 2010 Camaro RS has Bose and sounds very good! FYI: My Nox is 3 months old and has 2400 miles.