Capacitor quality for crossover

Nicola · 19th May 2010, 06:26 PM

Simple question : what capacitor any of you would advise for a high pass cross over at 10kHz. MKT or MMK type ?

rabbitz · 20th May 2010, 05:40 AM

I'd suggest MKP. See this for some ideas of brands.
Humble Homemade Hifi

Nicola · 20th May 2010, 08:24 AM

Quote:

Originally Posted by rabbitz

I'd suggest MKP. See this for some ideas of brands.
Humble Homemade Hifi

MKP or MKT - you write MKP but I never heard about MKP....
Thanks

rabbitz · 21st May 2010, 07:40 AM

Metallised polypropylene (MKP) are the better type of caps to use in speaker crossovers. Like these:
http://www.soundlabsgroup.com.au/c/C...rs+-+Poly.html

Have a look around at the projects online and you'll find most use MKP caps and very few will use MKT and I've never seen one with MMK.

wwenze · 21st May 2010, 09:24 AM

MKP is pretty common in commercial speakers also, examples M-Cap, Bennic, Solen

skeptic43 · 21st May 2010, 11:28 AM

An independent review and summary of available information on cap tests.

Capacitor voltage rating vs performance - The Classic Speaker Pages Discussion Forums

grantnsw · 21st May 2010, 02:24 PM

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

Andersonix · 22nd May 2010, 02:57 AM

You need to find your own comfort zone between affordability and ultimate audiophile approval. Apex Jr has several large value metalized polypropylene caps cheap.

rabbitz · 22nd May 2010, 06:01 AM

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.

PaleRider · 22nd May 2010, 06:48 AM

Intertachnik KP-SN tinfoil. Superb cap, not overpriced. Long burn-in.

19th May 2010, 06:26 PM	#1
Nicola diyAudio Member Join Date: Sep 2006	Capacitor quality for crossover Simple question : what capacitor any of you would advise for a high pass cross over at 10kHz. MKT or MMK type ?

20th May 2010, 05:40 AM	#2
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	I'd suggest MKP. See this for some ideas of brands. Humble Homemade Hifi __________________ No longer DIY active

21st May 2010, 07:40 AM	#4
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Metallised polypropylene (MKP) are the better type of caps to use in speaker crossovers. Like these: http://www.soundlabsgroup.com.au/c/C...rs+-+Poly.html Have a look around at the projects online and you'll find most use MKP caps and very few will use MKT and I've never seen one with MMK. __________________ No longer DIY active

21st May 2010, 11:28 AM	#6
skeptic43 diyAudio Member Join Date: Oct 2009 Location: new england	Cap voltage ratings vs performance An independent review and summary of available information on cap tests. Capacitor voltage rating vs performance - The Classic Speaker Pages Discussion Forums

22nd May 2010, 06:01 AM	#9
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	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. __________________ No longer DIY active


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21st May 2010, 09:24 AM	#5
wwenze diyAudio Member Join Date: Mar 2008	MKP is pretty common in commercial speakers also, examples M-Cap, Bennic, Solen

21st May 2010, 02:24 PM	#7
grantnsw diyAudio Member Join Date: Aug 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

22nd May 2010, 02:57 AM	#8
Andersonix diyAudio Member Join Date: Jan 2004 Location: Silicon Valley	You need to find your own comfort zone between affordability and ultimate audiophile approval. Apex Jr has several large value metalized polypropylene caps cheap.

22nd May 2010, 06:48 AM	#10
PaleRider diyAudio Member Join Date: Nov 2003 Location: home	Intertachnik KP-SN tinfoil. Superb cap, not overpriced. Long burn-in.

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