High Efficiency Speaker Asylum

Need speakers that can rock with just one watt? You found da place.

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RE: If it is high level HD.....

Posted by Paul Eizik on November 23, 2020 at 11:20:30:
Back in the early/mid 90's Sound Practices magazine exploded on the scene with the then outrageous idea that the SET was the best amplifier topology, with horns as the default preferred speaker type for them. It was interesting to see this play out in the audio magazines at the time. Stereophile's John Atkinson declared the first SET they tested "...a tone control..". One of the best articles about the then new (outside of Japan) SET craze was in Audio magazine, now unfortunately gone. Among the usual tests and discussions thereof about the harmonic distortion spectrum of various amps, the author included slew rate tests of the 300B SET he used for the article. He found that the slew rate performance of this 8 Watt amp was surprisingly good, and stated that you would have needed a 90 Watt class A transistor amp to equal it. I haven't noticed any other discussion of this, but it certainly begs the question of the audibility of slew rate performance and how it contributes to the SET sound. At an audio show in the late 90's I heard one of Nelson Pass's Aleph transistor amps which sounded more tube like than some of the actual tube amps at the show. So I don't know if an add on is needed, you just pick your speakers and then the amp to match, though Sound Practices seemed to start with the SET amps which then picked the horns for them.

Paul