yea, it was just the way i interpreted your post, i thought you meant it wasn't producing at all when you were at lower rpms, i mean it wont have peak output until xxx rpms but it will have some output at idle, but barely enough to sustain a few amps and provide power to your lights, heater/ac etc, i'm wondering if it could be an issue with your rca's, are the rcas and the power and or ground wires close together or touching? i had a problem similar to yours and i need to run my rcas and remote turn on lead down one side of my truck cab and the power down the other side. i don't know if that could be a ground related issue, maybe there is something internally wrong with your amp? sorry if it seems like im just thinking of questions to ask you, i used to do some installation PT for a local car audio shop but it closed about a year and a half ago, so i have an idea of where to look when troubleshooting electrical things but im not the most knowledgeable, hope it helps--Dinty