Like the title says, I have one of these I've been using for my guitar and mic set up. Today I hooked up a new set of speakers to it and everything was fine. A few hours later, I went to use it and it is now only putting out a very small amount of sound if I turn everything up to full. The led gauge is saying that it is almost maxing out, but almost nothing is coming out. I've tried the 2 speaker outputs in the rear and the main output in the front. Same everywhere. I have a multimeter and I know how to use it, but I have no ide where to start. Any help would be greatly appreciated. Thanks.