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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Re: I disagree. posted by Dan Banquer on July 17, 2006 at 16:42:46:
Hi DanI would bet that it is audible in circuits with no -fb to make it smaller.
Some modern amplifiers have multiple signal transformers, choke loading and no –fb.
Depending on the woofers harmonic components, these could do anything from add coherently to partially cancel out depending on their phases.
On a top notch output transformer, it was still in the percent range even down to one volt RMS to the primary (tiny signal level).
It is weird too, if you did an FFT of fundamental and harmonics, all the harmonics fit a curve, like how a filter could shape a band pass of a circuit, here it is in the distortion spectra.
The cause is small scale “kinkyness†in the iron’s BH curve.I would bet that fairly often what the “we will never measure†crowd hears in the deelux amplifiers are artifacts who’s presence are obvious in the same repellent measurements. Many things that are popular now in Tubeland, were rejected step by step as the art originally progressed. Each time a better way was found, the new way was heard as an improvement, push pull replaced single ended, capacitor coupling replaced transforming coupling and so on.
Now all the extra sound those stages made are desirable because “they sound like more like musicâ€
As for me, I’m a simple man, all I really want something that measures like a straight wire with about 26dB of gain, DC to light (DC to AM band would be ok), able to swing a 150 V peak into 4 Ohms, at Best Buy for $150 but won’t die in two and a half years.
Best,Tom
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Follow Ups
- Re: I disagree. - tomservo 19:20:36 07/17/06 (1)
- Re: I disagree. - Soundmind 17:52:26 07/18/06 (0)
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