Bligh Me!
So I was tube rolling the input tubes, and somehow missed the tubes in the pre-amp (Inspire 2030p) going out, at the same time, with volume reduction in BOTH channels. The Amperex 7308's sounded so good I never tried back other input tubes or thought to check the pre-amp. But when I switched over to my XP-17, it was rocking loud. So I took the pre-amp out of the equation and presto! I have a beast with good sounding 7308's and plenty of headroom again!!!
Sometimes it is that simple... I would think 25 wpc would drive anything with a sensitivity of 93 and up.
Thank you everyone, I'm embarrassed, but I'd rather be embarrassed AND relieved. Not only that, but this combo sounds much better without the pre, even after I replaced the tubes. If anyone is looking for a 2030p....
Best!
Steve