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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Why? (NT) posted by Uwe on November 21, 2000 at 03:08:07:
...not all caps are created equal.Some are low ESR (Equivalent Series Resistance) and ESL (Equivalent Series Inductance). Given similar construction caps, a bunch of small, paralleled caps will exhibit lower levels of ESR and ESL than one large cap.
I should stress that the effect of paralled caps is most noticable on amplifiers which have a rather poor PSRR (Power Supply Rejection Ratio). A poor PSRR is usually a downside attribtable to ZGNFB (Zero Global Negative FeedBack) amplifiers.
Is the effect significant?
Most emphatically, YES. I have been involved in several double blind tests, involving large caps vs. small caps, in ZGNFB amps since 1979 as both te4stee and tester. The small caps were chosen 100% of the time by all listeners.
Trevor
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- Because... - Trevor Wilson 11:37:48 11/21/00 (0)
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