I have a new HU (kdc-3025) about 2 months old with the Sirius hook up. Nice system but I noticed if I listen for more than 30 minutes, the sound quality of my system goes does down and degrades at high volume like the speakers are blown. After I turn the system off and let cool down for a minute or two, I am fine again for a while. This happens in both CD mode and tuner mode. I don't know what the problem would be. I bypassed the factory amp and they are stock speakers. Any ideas?
