Capacitor quality for crossover

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grantnsw

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Joined 2006
Hi,

For what its worth, regarding Nicola'a 10kHz point, I received this helpful advice from Friedmann at Visaton last year,
(I hope its ok to quote him, 27/Oct/2009) :

>> "I think a peak at very high frequencies produced by a fullrange speaker is not audible. It is not comparable with a dome tweeter. In contrast a peak in the response of a dome tweeter is bothersome. I recommend testing the FRS8M and I am convinced that you will not miss a supertweeter. By the way, it is nearly impossible to add a supertweeter at such high frequency. The wavelength is so short that phase conditions are super critical. Our experience is that usually a good single fullrange sounds better than with additional tweeter." <<

but, only teenagers can hear past ~ 10kHz if they don't have hearing damage from iPods? Correct me hear, err here!
Regarding capacitor type at 10kHz, would it matter what was used? My question is: .. use as cheap as possible?

Grant
 
rabbitz

rabbitz

Member
Joined 2003
At 10kHz it's going to be a small cap so should not break the bank.

One thing that has to be considered is usually you get better results adding an inductor to the other driver (mid woofer?) which makes the summing, integration and hopefully phase better than a non filtered driver.
 
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rodrigosalvati

Member
Joined 2009
Hello, can anyone tell me what type of capacitors these are? I am trying to find out what they should be replaced with, and under which circumstances. The square silver ones are in the eq circuit of my mixer.

Thanks
 

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multi

R.I.P.
Joined 2011
Anyone thought of using motor start capacitors? When I replaced one recently I was surprised to find it was Polyprop and being 5uF the right sort of value for crossovers. Also being mass produced cheaper than specialist audio caps.

Motor start capacitors are excellent for crossovers. Specialist audio caps are a wast of money.
Phil
 
dragonweed

dragonweed

Banned
Joined 2010
"Sonically average" means that they are not better or worse than other brand's (WIMA, Philips, ERO etc.) similar MKT capacitors. And of course they are less in sound quality than most MKP-s, MKC-s, and varoius exotics. I've done a few thousand of hours of subjective evaluation, comparision and listening with different caps (being a speaker designer by trade), so I have some idea of what I hear. If you are in the same trade, welcome for a discussion....
 
system7

system7

Member
Joined 2008
rodrigosalvati said:
Hello, can anyone tell me what type of capacitors these are? I am trying to find out what they should be replaced with, and under which circumstances. The square silver ones are in the eq circuit of my mixer.

Thanks
Click to expand...

Those are polyester layer. Like this, used in opamp circuits:
Polyester Layer 0.47uF Capacitor | Maplin

Just for fun, here below is what Harbeth use in their crossovers. MKP's (aka Polyester) and surprise, surprise, ferrite core in tweeter crossovers. So what do you know? :D
 

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