Hi Paul,
Yes, in the direction I am going in at the moment, which is towards, push-pull pentodes with partial feedback, the single power supply solution seems to be the way towards maximum sound quality from the topology.
If you had asked me two days ago I would have still raved about twin power supplies, but the results I get with the single PSU are better than with dual power supplies......only with this particular circuit topology, I have to emphasise that.
With hindsight, the mistake I made was generalising from the particular.
My first foray into dual power supplies was with the Harvey Rosenberg inspired, twin PSU, triode strapped EL84 and 6AQ5 amps, which then went Ultralinear; this then led to more powerful, triode-strapped KT120s.
It was when I went pentode with partial feedback that the wheels came off.
I found as explained at length earlier, that you can't, (if you are using plate to grid feedback, anode follower, Schade, whatever you want to call it topology on your output stage) use multiple power supplies, because the necessary plate to plate connection, firmly connects the two supplies together, destroying any benefits you might have gained, and possibly causing who knows what other hidden problems.
You're right though, I seem to have found myself going in a direction, that is diametrically opposite to everyone else. Oh well, never mind, You have to go with what floats your boat. Pentode push pull amps seem to do it for me. I can't help but love the sound they make
Sgt. Baker started talkin’ with a Bullhorn in his hand.