Ok so I have a 2010 LGT with HK with no nav
I am having a strange problem with the radio/sub...
When I listen to FM/AM radio the sub does not have any sound come out of it -- no matter what I turn the bass to, no matter what FM station, no matter what song, even laying in the trunk feeling the cone of the subwoofer while my wife cranks up the radio with me in the trunk... No bass
However, if I put in a CD or plug in my iPhone and listen to music thru Aux, all is well. You can clearly hear the sub and it sounds wonderful...