In Reply to: The important thing is how the ear percieves distortion. posted by Ralph on July 29, 2014 at 13:24:28:
"I also agree that speakers that are easier to drive (and IMO, higher impedance as well) are quite a boon as it then becomes possible to have some serious sound pressure without a lot of amplifier power. Some amplifiers (zero feedback in particular) are best run such that the output power probably does no exceed 20-25% of full power. This helps keep the distortion down, often to the point of inaudible and unmeasurable. "
Now that's what I'm talking about!
A SE amp with a very linear driver tube and a very linear output tube operated in the most linear way possible to the point that the first 20-25% (as you say) of the operation is so linear that there in almost no mechanism for producing harmonic distortion.
The increase in current (decrease in voltage) half of the operation, of both the driver stage and the output stage, is the same shape as the input and the same size as the decrease in current (increase in voltage) half.
There is almost total symmetry, thus no distortion and all without the need for GNF.
As you already know, to me that's the big advantage of Class A done right.
Tre'
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Follow Ups
- RE: The important thing is how the ear percieves distortion. - Tre' 10:16:50 07/30/14 (9)
- RE: The important thing - genungo 11:19:47 07/30/14 (8)
- Accurate, efficient, affordable, high-impedance speakers - Brian H P 16:48:23 07/30/14 (7)
- RE: Accurate, efficient, affordable, high-impedance speakers - morricab 11:07:16 07/31/14 (0)
- Some horns have colorations and some are really really accurate! nt - Ralph 18:32:06 07/30/14 (5)
- I'd love to hear some really good ones. Suggestions? - Brian H P 09:26:48 07/31/14 (4)
- RE: I'd love to hear some really good ones. Suggestions? - djonisidik@zoho.com 04:17:18 11/19/17 (0)
- Classic Audio Loudspeakers. Nt - Ralph 16:07:27 07/31/14 (0)
- Odeon - morricab 11:11:11 07/31/14 (0)
- JBL - genungo 09:52:01 07/31/14 (0)