Isn't this what a buffer is for? The Burson AB-160 may be worth trying.
Anyway, I'll echo what others have said: I'd get rid of the Dude sooner than I'd abandon SET amplifiers. Although to be fair, I don't know why a different pair of SET amplifiers with a higher impedance wouldn't do the trick.
Anyway, I'll echo what others have said: I'd get rid of the Dude sooner than I'd abandon SET amplifiers. Although to be fair, I don't know why a different pair of SET amplifiers with a higher impedance wouldn't do the trick.