2008 Honda Accord: Speaker noise problem?
 

I bought 2008 Honda Accord EX this January, and from the Day 1, I've been hearing this popping noise from the rear speaker when I turned on the audio - either radio or CD. The popping noise continues about 3-5 minutes, and it's gone. But, it comes back next time I start the car and turn it on. The noise is so loud and annoying that I can't enjoy my first few moments of driving. It does that everytime I turn on the audio, and it's been like this from the Day 1 so far. I had been to the dealer shop for repair but all they told me was all other same models have the same noise, but they cannot do anything because the Honda Headquarters has not notified them of the issue / solution yet. (What??) They said they wouldn't do anything even my car is under full warranty and it's been just 3 months old... I called the Honda Customer Center, but the representative told me if it's the 'characteristics' of the car, they won't be able to fix anything. Has anyone had similar problem and had it fixed?

Sounds like a ground problem to me but with car only 3 months old i would dam sure take it back to the dealer and let them fix it or put in a new sound system. If they give you any crap start yelling to anyone who will listen not to buy a Honda at that dealership sometimes u have to get nasty with em