OK ya that sounds like no fun but here it goes. I'm really wanting to upgrade my sound system but the factory amp has me very unsure about the outcome. Now id like to get a alpine head unit and this new thing they have out now Alpine KTP-445 Head Unit Power Pack now what that does is boost the head units RMS from 18-45 all at ohms going to the OEM amp which i think i heard it was rated for 2 ohms as well as the speakers. So does any one have a clue what would happen with 45w RMS 4 ohms going into the 2ohm amp and pushing 4 ohm kicker ks650.