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.
03-04-2013 08:39 AM
I kept my stock head unit as well and I'm paying for it now. The unit cannot properly regulate aftermarket subs apparently because it causes my subs protection to shoot on and cut off power to the sub whenever I raise the bass to a decent level. Now I have twin 12s sitting in the trunk barely on because of it. Took it to multiple sound shops, replaced the sub thinking it was the cause, and still it happens. The last shop I took it to said he read this head unit will send abnormally high voltages and mess up the bass. Idk if that was BS or not but sounded plausible. .
03-04-2013 09:26 PM
Thats what I was afraid to be the case. When my 12 inch sub is rattling the windows with talk radio I knew something was wrong. God- all I wanted from this piece of crap is the signal and it can't do that. I will need to find a radio that is Sirius and that is about it. I have everything locked down so I don't want a aftermarket radio in the dash. Maybe a removable face plate. This radio has also cut off about 5 minutes into a 3 hour drive so it is time to go aftermarket.
03-04-2013 11:42 PM
What amplifier are you guys using?
03-06-2013 08:02 AM
2 brand new amps by Alpine, no rca's on stock head unit so we are doing line in's. Gain is zero.
03-06-2013 12:23 PM
Stock HU is most likely the culprit. The frequencies are altered to perform with the crappy stock speakers. If you are dead seat against a new HU, you can go with a signal processor to fix the frequencies, but it will cost as much as a new HU. BTW, I went with the JVC Kw-AV64bt. Double din with detachable face plate--since security is definitely a concern when riding doorless/topless. Hope this helps.
03-06-2013 12:28 PM
Get a 1/8" mini (headphone jack) to RCA converter and go directly from your phone/mp3 player into the amp and see if that makes a difference. Just a troubleshooting step, I'm not suggesting permanently running that way. Just make sure to start with your volume all the way down on the device and then work your way up.
04-11-2013 08:20 PM
Found it! It was a bad fuse holder on the battery. go figure, I replaced about everything to find it but at least my system looks good and the head and EQ are cheap but great. http://postimg.org/image/5di5p4mut/