I purchased a Dual XDMAR6270 from Walmart because the stock radio in my car broke. I also at one point replaced my front door speakers with dual coaxials and they worked really well for a while. This head unit has USB input with the iPod/iPhone integration. Recently if I'm listening to music for a long period through my iPhone in the USB input, or loud volume the front speakers will begin to crackle. A lot. But if I unplug the USB cable and plug it back in the crackling stops for a while. I can't get it to do it through the 3.5mm input which my xm radio is hooked to nor through the CD player or fm tuner. Any ideas on why it does this?
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