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Old 8th January 2005, 04:04 AM   #1
VS is offline VS  Portugal
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Default Best capacitors for Audio?...

Hi,

Can anyone explain me what type of capacitor is the best
for audio ? (signal coupling purposes)

Polypropylene?
Metalized Polypropylene?
Polystyrene ?

(Mica, Polyester (Mylar) and Metalized Polyester...not for sure !)

PS: in Ono/Xono design are all Metalized Polypropylene caps? (except large capacitances of course)
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Old 8th January 2005, 04:14 AM   #2
Prune is offline Prune  Canada
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Only Mylar is supposed to be no good from your list.

There are even some ultra expensive teflon capacitors:
http://www.v-cap.com/

I myself stick with Auricaps because they are cheaper and I've never read complaints about their sound quality around the web.

There are also copper, silver, and I think even gold film caps, as well as ones using beeswax as the dielectric. I'd say it's the biggest marketing scam after the health supplement industry.

For power supply electrolytic cap bypassing, I doubt it makes a difference, so go with the cheapest.

The best thing you can do is avoid signal coupling capacitors completely and design your circuit to be DC coupled. One trick is to use a common base configuration for voltage shifting.
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Old 8th January 2005, 04:15 AM   #3
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Capacitors with dielectrics of the poly- type (polystyrene, polypropylene, etc. - and to a less extent, polycarbonate) or Teflon tend to have good performance. Sometimes it's better just to read as many unbiased reviews as possible, instead of just looking at numerical specifications (there are many that measure extremely well).
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Old 8th January 2005, 04:16 AM   #4
Prune is offline Prune  Canada
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There's no such thing as an unbiased review.

Also, Mylar is polyester, and given the talk about how bad sounding it is for a film capacitor, your 'poly-' generalization is not correct.
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Old 8th January 2005, 04:23 AM   #5
VS is offline VS  Portugal
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Quote:
Originally posted by Prune
There's no such thing as an unbiased review.
Yeah, as in 99.99% of the reviews!...
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Old 8th January 2005, 04:28 AM   #6
VS is offline VS  Portugal
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What do you think about Mundorf Caps ?

http://www.mundorf.com/english/baute...ondensator.htm
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Old 8th January 2005, 04:47 AM   #7
Prune is offline Prune  Canada
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I think it's been mentioned either in these forums or over at head-fi.

Take a look at film cap prices here:
http://partsconnexion.com/
(and these guys are usually cheap)
AudioNote Silver foil 3.3 uF 600 V -- $1,389.90
I was going to say something about those that would buy this, but then I thought, it coulb be worse -- you could buy $10000 interconnects, or pray to some Gawd, or wear a magnetic bracelet to improve your chi...
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Old 8th January 2005, 05:31 AM   #8
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I like polypropylene for passive crossovers and coupling, and polystyrene for tuned circuits (active crossovers).
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Old 8th January 2005, 12:06 PM   #9
acaudio is offline acaudio  Germany
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Hi,
I use the WIMA MKP4 10F capacitors, the sound is very good and these are cheap. See here: Aleph P1.7 first pictures
I have compared these with "normally" Mundorf , the Mundorf sounds no better, but costs... I buy the MKPs over my company for aprox.2EUR / piece.

greetings
Adam
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Old 8th January 2005, 12:20 PM   #10
Zombie is offline Zombie  Sweden
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give the Russian PIO and teflon caps a go...good price/quality
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