http://www.hdforums.com/forum/touring-models/874116-harmon-kardon-question.htmlmore info ... (SNIP) = calibrate
It's not the antenna I have changed out BOTH antenna's with 4 different types (And I am not talking about cheap ones either),plus I have pulled the fairing off on more than one occasion, so I made sure to check the connection to the radio including the wire all the way back to the rear. Plus I just installed a Rockford Fosgate amp with two Focale speakers in the front,and none of that helped. But since I last checked the forum, I went out and checked the radio to make sure the software was up to date. It was, but while checking the head unit I noticed next to the soft keys, in this mode, something new on this radio that was NOT on the radio on my 2008, there is a Calibrate button, and a total reset to default settings button. First I reset to default settings, then I pulled the bike out in the open for no interference and I pushed to calibrate button, the radio went silent and the word calibrate lit up for about 10 seconds and after I reset all my preset stations, my local stations started coming in clear as a bell. FINALLY!!!!
I dis not have this option on my 2008 RG but either way, now this radio is as clear as my other one.