Ultralinear vs. Triode vs. SET

Droz,
As predictable many opinions and experiences expressed here, as each type of amp design has some level of compromise(SET,PP,OTL,etc.) The 300b PP route is ok but won`t offer anymore speaker flexibility than say a 845 or 211 tube used single ended. There are`nt extreme limitations of speaker choices either( even if you choose a 300b SET). With a PP 300b you will gain power, but now you`ve introduce phase splitters to the circuit. The SET approach will generally sound purer and even more natural(very simpler circuits tend to sound more natural) Since the original post was an inquiry of SET AMPS i sincerely hope you have the chance to hear them in a well thought out system and judge with your own ears. Just for the record I can play any type of music I want with my 8 watt Coincident Frankenstein. Don`t think you have to limit your music selection at all.
Best Wishes

For my taste, a speaker well matched with an OTL is the very best type of amplification overall, especially if you include compatability with a broader range of speakers than is possible with most SETs; and much better frequency extension with very resolved midrange. If you are intrigued with SET, a good time to also consider OTL (Atma-sphere, Joule, Transcendent, and soon Music Reference - there are others).

Charles1dad made the solid statement that you would get many "opinions and experiences expressed here" and then expressed his. As I read the original post, it is not an inquiry exclusive to SET amps but a comparison between SET and other designs. While I guess the word extreme is subjective, we disagree that SET's, in general, aren't much more demanding and restricting of the speakers they're matched with.

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