I have the Pioneer P-8800, the silver double din one. and my car sat for 3 weeks while I was out of the country, and when I came back, the stereo worked, and I thought nothing of it. Drove home after picking the car up with the stereo very low...I wanted to hear the car since I thought the muffler was going...it was.
So, the next day, I turn it up past 20, 40 is very loud, and it made the loudest screeching noise ever. I thought it might have messed up my speakers. So, I turn it off, wait a minute, and turn it back on. It does it again. So I hit the reset button, and it worked after that. So it works for about 10 minutes, then I turn it up a little past 20 and bam, it does it again. After that, the reset button wouldn't even fix it. So I had to pull the deck and take it to a Pioneer service center. They haven't gotten back to me, but I want to know what the hell that was. I'll post when I find out.
My buddy left a cell phone in his trunk near his sub and forgot about it. We kept hearing a weird static noise, loud enough to be a real problem. We couldn't figure out what it was, then as we were listening to it, trying to figure it out, he realized he didn't have his phone. He looked in his bag in his trunk, and it was ringing...every time it rang, it was making a really bad noise through the whole car, but only when the phone was near his sub....another weird one.