I have searched and cannot find someone that has identified this problem. My radio in the 2012 JK is the cheapest model, no sub, just bare bones. I have replaced everything but the head unit, I have the stock head with 4 Polk audio. Speakers and one alpine X sub.
I know that it is a strong sub but something is not Right. This sound is booming, it will even boom on voices like Howard stern or HLN news. I have never had a radio act like this, gain is down to zero, head unit bass is down to zero. I am convinced it is the head unit, maybe it is because we used line in's since there are no RCA,s. This happens on both Sirius and radio. The radio audio also has turned off before for days and then will come back on.
I wonder what the dealer would do with a bad head unit but all my after market stuff.