Put in 2- JJ ECC83S's, big difference. Useable gain till 6.5 or so, the low end is signifigantly tighter, still a bit flubby, and the top end is a little fuller and more natural sounding. It definitely has a Montrose vibe to it. I might pickup a good 6L6 and try it. I love the early Montrose which was mostly his Bandmaster into 3-10's I think so maybe I got lucky.
Bought it on a whim so I'll take some luck
Oh it does not like my Special with P-90's so much but the LP with the DA-59s, yeah they work together