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In Reply to: RE: If they work properly they don't tick. posted by morricab on May 22, 2025 at 08:25:12:
First, it seems none of us know what effect transformer isolation has on an amp. Have you measured an amp, playing music signals while also interacting with a real (speaker) load? Nope - nobody has. We don't have the tools to do that, really, I think.On another note, there are some big problems with your amp-quality-assessment methodology above.
First, high-sensitivity speakers often have serious FR aberrations - both rising response and peakiness. It may be that an amp that is more accurate in terms of FR response sounds worse on such a speaker, completely independent of distortion.
Relatedly, of course TX-coupled amps behave very differently into real loads than do non, which means more frequency-response differences.
Horns: I've had a lot, front and back. Probably the most revealing, certainly the most esoteric, were Cogent field-coil compression drivers in conical horns. (I had only the mid horns, mated with BR bins.) On these horns LM3875 gainclone amps were highly competitive with premium low-watt SETs (45/50 tubes). OTOH at the time I know I was not listening for the things I find most appealing now with TX-coupling - and also there was really no treble in this system.
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Follow Ups
- RE: If they work properly they don't tick. - PaulF70 05/28/2509:48:39 05/28/25 (0)
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