Erwin, that sounds like that your OTS is painfully bright without the Dumblelator! Does your amp sound much different than that day I tried it? It was already a monstrous sounding amp back then... also what's that nice Les Paul in your pic? Looks like a real old one, is it?
Emiel you're right; My ots sounds painfully bright without a dumblelator.
It's a little different; I changed my presence circuit a little further to match it with g12-65 speakers. Also my dumblelator has some tinkering in the low end.
The les paul in the pic; it's owned by the the guy that had the Van Weelden. It isn't a real one and it's artificially aged