Hi Guys, As usual, I'm sure this has been covered a bunch on TB, but I couldn't find it immediately. I have an Orange TB1000 and the OBC 4x10 and OBC 115 stack. Both cabs are 8 ohms and the 4x10 is rated at 600 watts while the 115 is at 400. I usually run both cabs with the head at 4 ohms. Obviously there are times that I dont want to carry both cabs to jam, so here is my question: Since I can run the head at 4 or 8 ohms, what risks do I run if I run the TB into the OBC 115? That is running a 900 watt class D head (I think the head is 900 watts at 8 ohms and 1000 at 4) into a 400 watt cabinet. To be more specific, I am wondering if the head is always putting out 1000 watts no matter where the volume/gain are set, or If it puts more wattage out as you crank the volume? Can I use the head with the 115 cabinet if I barely crank the volume, or will plugging the head into the cabinet in general result in overdriving the cabinet and possibly blowing it? Is there any negative effect on my head by doing this, or would the risk just be posed to the cabinet? Thanks!