Ultralinear vs. Triode vs. SET


I currently have a Rogue Cronus that I have been quite satisfied with, but I am intrigued with the possibility of a SET amplifier. From both a technical and sonic perspective, what are the differences between a tube amp with switchable ultralinear and triode mode vs. a true SET amplifier?
droz
Sparky: "My problem is I have never heard a high efficiency speaker that I would die for. Yet, these are the only speaker types that a set amp can drive."

WRONG WRONG WRONG. SETs can drive any kind of speaker, some better than others. You just haven't experienced SETs driving relatively-lo-sensitity as I have. My 50- and 12-Watt SETs drove and drive my Quad 989 and Audio Physic Avanti speakers excellently.
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Hi phaelon,
No real disagreement actually, Droz said he wanted comparisions with his switchable PP tube amp and a "true SET"amp. If he wants to expand his options, a 300b PP amp would be a good way to go i.e. the beauty of DHT tube vs a pentode indirectly heated tube. Many opinions is what I`d expect on a open forum that`s all. Regarding speakers , yes theh`re some restrictions but Droz has a lot more choices available then some would lead him to believe. Zu, Tonian Labs, Coincident,Horning,Audio Note, Living Voice, you get the idea as the`re many more.On the other hand if he was basing a system around an inefficent speaker he would then have to deal with limiting the pool of amplifiers( always some compromise is`nt it). Phaelon you have the NAF amp from Italy correct? I`ve never heard one but love the look of them.

Take Care
"I`ve never heard one but love the look of them."

Yeah Charles, that's the nice thing about the Italian stuff; if you don't like the sound, you can always put it on the mantle and call it art. :-)
HI Jefferybehr,

How can my statement be wrong? The speakers you mention may impress you. But me? How can you put those words into my mouth? I resent you trying.

And how do you know that excellent to you may be junk to me. Do not try to push me in that direction. I know what I like. And, I don't like SET's. Sorry. I don't even think they can be called hi fi.

Sparky
Atmasphere, thank you very much for that clear and informative synopsis. Great stuff.