@dhcod glad to hear your found a problem and it wasn't a head scratcher. your amp distorting with 96dB speakers would have been, assuming non-concert volumes.
SET Distortion at higher volumes?
If my SET amp is running out of power with my 96db speakers, does it create distortion that sounds like a record mistracking? I'm trying to track down an issue I'm having at anything over medium levels. I'm getting a high end distortion. Happens at high frequency or energy vocal and horn and piano passages.