Well Travis is getting a new amp.....that way no mistake can be made, no middle problems if something were to happen in a re-boarding process. It will be an A stock brand new amp, that has been on our bench for a few weeks running every speaker setup under the rainbow, currently a single tower running bridged at 2 ohms both channels. Using all HPF combos, and bandpass too,,,,,we replaced the amp with travis' 1100.4 JUST the same way. After about 3 hours of play time, its gotten fairly warm, as it definitely should be running at 1 ohm a channel, and its working as it should. So we've tried to find the problem, multiple times, the only thing we've seen could be a possible cause was a good sized dent on the heatsink as if it was dropped before. Other then that, hopefully the new 1100.4 recieved works as should, otherwise must be an install problem Thanks for the understanding.