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Critic's Corner Discuss a review. Provide constructive feedback. Talk to the industry. |
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In Reply to: That "myth" was born in Audio magazine, c.1979, by Jung and Curl -- been known ever since. nt posted by clarkjohnsen on March 6, 2007 at 11:44:24:
Don't you mean 'Jung and Marsh' ? I did write about cap non-linearity in 1979 in 'Omitted Factors in Audio Design' in 'Audio' but I did not mention dielectric absorption, which I did find important with a different sort of distortion test, after reading 'Jung and Marsh's article on cap selection.
What is amazing about Klaus is that he does not know or understand cap distortion. This is one of the fundamental factors that separates mid fi from serious hi fi. It can be measured by just about anyone, who is technical, IF they were so inclined.
The interesting thing about caps is that this distortion is not usually measurable at mid frequencies with sine wave or SMPTE IM distortion, partially because of the symmetry of the test waveform (music is not as symmetric as a rule) and because coupling caps are virtually shorted out in the midband, but caps have serious voltage drop across them when used as either low pass or high pass filters, which they invariably are at some practical portion of audio source frequencies.
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Follow Ups
- Re: That "myth" was born in Audio magazine, c.1979, by Jung and Curl -- been known ever since. nt - john curl 14:38:04 03/06/07 (11)
- Yes, of course -- guilty of conflation! But those articles *really* got me thinking seriously about audio. Why... - clarkjohnsen 08:16:10 03/07/07 (0)
- It's not about cap distortion! - KlausR. 00:27:53 03/07/07 (9)
- Re: It's not about cap distortion! - john curl 01:20:08 03/07/07 (8)
- Yes-that Audio article revolutionized thinking on caps. - nightdoggy 07:56:24 03/07/07 (0)
- Re: It's not about cap distortion! - theaudiohobby 01:53:12 03/07/07 (0)
- Re: Ever actually get your hands on test equipment? - KlausR. 01:39:10 03/07/07 (5)
- Too bad the Prop Head Express didn't collect you... - bjh 05:04:23 03/07/07 (0)
- Wow. - Dave Pogue 04:06:50 03/07/07 (3)
- Sorry your vinyl playback gear is so lame, says the blissfully ignorant! - KlausR. 04:22:35 03/07/07 (2)
- I'll be sure to put it on my reading list - Dave Pogue 04:31:21 03/07/07 (1)
- Have you read The Brothers Karamazov? If not you might want to - bjh 09:05:06 03/07/07 (0)
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