I have a 2010 Ultra SE AND AM USING THE FRONT 7.25 J/M SPEAKERS WITH HOGTUNES IN THE BACK. At high speeds 80 plus it seems to have a fluttering distorted sound. I did not know about the AVC or cb or not having the bass and treble settings all the way up which is where mine are set. I will try those changes and see if it helps. Is anyone else experiencing the distorted flutter at say plus 75mph. When sitting still the thing cranks but I need that at 80 mph. THANKS, MACK