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In Reply to: RE: New installation of my A-S OTL amps posted by jeffreybehr on June 14, 2019 at 20:36:30
...excellent driving my 96dB-sensitive speakers.
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Tin-eared audiofool, lover of large-scale Classical and film music and movies, and amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
Follow Ups:
This will drive the output impedance of the amp up substantially.
...Super-7s, so everything works very well, at least as far as I can hear.
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Tin-eared audiofool, lover of large-scale Classical and film music and movies, and amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
If the Super 7s have a woofer array that is as easy to drive as the mids and highs, you might consider running them full range (with more power tubes and a passive crossover). That amp has full power bandwidth to 1Hz.
The MR and tweeter are B-G mag-planars without impedance peaks.
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Tin-eared audiofool, lover of large-scale Classical and film music and movies, and amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
If the midrange and treble have large changes in impedance, the amps output will tend to follow those impedance changes more with fewer output tubes installed. Though this is most audible with low frequency drivers, it's not absent for most midranges and tweeters.
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