Here is the deal. My friend has 2 Kicker CVR 12" hooked up to a Power Acoustik 1800w mono class d amp. My friend and I were listening to a bass cd the other day and smoke started to pour out from under the seat with a bad smell. We thought at first that it was the amp because the smoke was coming up from under the seat and that is where the amp is. When we got out of the truck we looked at the speakers to see if they were ok. They were a little warm and with the key out of the truck they were giving a very quiet squealing noise. We turned the speakers back on and they still beat but they have a rattle to them as if it is a static. Now my question to you is did he blow them or did he blow his amp? Could it be a transistor in the amp went bad?
