I recently replaced my PS Audio HCA2 (switching amp) with a Pass X150.5 and was hoping someone can explain to me why the sound of this solid state amp changes so much as it warms up? Tubes need to warm up, I get that...but solid state? When I first plugged it in, I was concerned I'd made a mistake, but helpful advice from Mr. P and others assured me that 24 hrs of feeding it juice would make all the difference, and it did. Now I leave it in stand-by, but even then I've got to give it a good half hour or so before she brings her big guns out to play. I've never encountered this before in a ss amp. The nerd in me wants to know why this happens