So frustrating! 2011 access cab

So I put in new fronts today in hopes the crackling would stop. Well it does stop unless the rear speakers are connected as well. Additionally, the rear speakers have to be operating in order to have the built in sub work. Apparently you can't just cut the wires going to the rear speakers and leave the sub, somehow they are integrated. I can fade to the front more to stop the crackling but then I lose the sub. So this shitty HU is causing this crackling and I can't remove the headliner to replace the rear speakers either. Whatever, just bought a nice new HU and sat reciever so hopefully this crackling will stop. I hope the stock rears can handle the new HU. The purpose of this truck is not to recreate a music studio but I go for long drives and would like some nice sound in transit.

 

Sounds to me like you have some type of aftermarket sub, not the JBL system? This would mean that whatever monkey business they did to integrate your aftermarket sub with your HU involves the speaker wires that feed your rear speakers as well (obviously). I would try to figure out where they tapped into those wires and cut off your rear speakers altogether at that point, keeping your sub connected, of course.

 

That's what I was gonna ask.....How do you know it's not a rear speaker wiring issue vs. HU?

 

A new HU should have a separate sub out put via RCA and a sub volume separate from the rest....it's probably tapped into one of your rear speaker wires now.