@jsbw Actually, my Dennis Had Universal SET amp has got a new lease on life. I had never really paired it with a preamp with gain but recently I got an old Cary SLP-70 preamp that had been heavily modded and I liked it so much I decided to try it with the Had and it sounded pretty good. Then I saw a post somewhere about the Tung-Sol 7581A tubes sounding good with the Had and I bought a couple of those and it really brought the Had to life. Next I bought a pair of Tung-Sol EL34B’s and they really sounded good with the Had. So now I’m playing the Had all the time and I’m glad I never sold it. I’ve been having tons of fun rolling tubes. I think adding a good preamp with gain really changed how the Had sounded. And the 7581A and EL34B tubes add a level of dynamics I hadn't heard before.
Which version did you just buy?