Monacor foilcaps, are they any good?

kmj · 12th March 2007, 09:46 PM

As the topic says, I got an offer to buy som caps for a pair of speakers I plan to build but I was wondering if they are any good. They are made by monacor and are cylindrical in shape. Metalic in colour and seems to be polyester. "MKT 250V"

Now, the parts for the crossover isn't that expencive but I find a certain pleasure in getting as good result as possible with the least amount of cash spent so if these are as good as "regular" brands then why not use them?

kmj · 12th March 2007, 11:15 PM

false alarm. The guy was in too much of a hurry to sell me the stuff that he managed to missread the values. He didn't have what I needed after all.

v-bro · 12th March 2007, 11:39 PM

Well, on your next search remember MKT is a good value for money. But nowadays MKP has also become quite affordable and is in many applications much preferred (like in midrange or tweeter filters).

So MKP is best (or some like it even more exotic, like KP-Sn or silver or copper in oil). Next comes MKC and than MKT. The lowest qualities are smooth or even raw foil electrolyte caps. But these electrolytes are quite suitable for a lowpass (as it won't be directly in the signalpath).

Low loss caps (MKT, MKC, MKP.....) can even have bad influences on lowpass filters...

kmj · 12th March 2007, 11:45 PM

Thanks, I did ask specificly för PP or even PIO-caps but since I got the offer for the Polyester I thought that I at least should check them out. Normaly I wouldn't even bother with MKT since I usually use MKPs but one of the caps was suppost to be 68uF which costs a bit

v-bro · 13th March 2007, 10:26 AM

It sure would, but parallel to a driver you could go for a simple "elko" (as they're called here...) however in series it would surely be better to go for PP (MKP)...

kmj · 13th March 2007, 10:31 AM

In this case it is going to be in the lowpass so I think I'll go with a bipolar electrolytic cap with a better 1uF MKP in parallell. I have some nice ones from Sprague lying around. How does that sound? Incidently, thats what the designer recommends even if he uses 2x33uF MKP in his prototype

v-bro · 13th March 2007, 11:07 AM

Wouldn't be surprised either if the results are even better with the bipolar electrolytic caps, but I'm not sure whether the addition of a 1uF cap will add much to the soundquality, I've read a lot of opinions saying the lower loss of high grade caps can work out negatively in parallel (low pass)...

v-bro · 13th March 2007, 11:08 AM

I think you should try and give your opinion here...

kmj · 13th March 2007, 11:09 AM

Ok, I'll go with the bipolar and when everything is OK I can always test other combinations. Thanks for the advice.

12th March 2007, 09:46 PM	#1
kmj diyAudio Member Join Date: Feb 2004 Location: Falkenberg	Monacor foilcaps, are they any good? As the topic says, I got an offer to buy som caps for a pair of speakers I plan to build but I was wondering if they are any good. They are made by monacor and are cylindrical in shape. Metalic in colour and seems to be polyester. "MKT 250V" Now, the parts for the crossover isn't that expencive but I find a certain pleasure in getting as good result as possible with the least amount of cash spent so if these are as good as "regular" brands then why not use them? __________________ .....Where the music comes to die.

12th March 2007, 11:15 PM	#2
kmj diyAudio Member Join Date: Feb 2004 Location: Falkenberg	false alarm. The guy was in too much of a hurry to sell me the stuff that he managed to missread the values. He didn't have what I needed after all. __________________ .....Where the music comes to die.

12th March 2007, 11:39 PM	#3
v-bro diyAudio Member Join Date: May 2006	Well, on your next search remember MKT is a good value for money. But nowadays MKP has also become quite affordable and is in many applications much preferred (like in midrange or tweeter filters). So MKP is best (or some like it even more exotic, like KP-Sn or silver or copper in oil). Next comes MKC and than MKT. The lowest qualities are smooth or even raw foil electrolyte caps. But these electrolytes are quite suitable for a lowpass (as it won't be directly in the signalpath). Low loss caps (MKT, MKC, MKP.....) can even have bad influences on lowpass filters... __________________ Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......

12th March 2007, 11:45 PM	#4
kmj diyAudio Member Join Date: Feb 2004 Location: Falkenberg	Thanks, I did ask specificly för PP or even PIO-caps but since I got the offer for the Polyester I thought that I at least should check them out. Normaly I wouldn't even bother with MKT since I usually use MKPs but one of the caps was suppost to be 68uF which costs a bit __________________ .....Where the music comes to die.

13th March 2007, 10:26 AM	#5
v-bro diyAudio Member Join Date: May 2006	It sure would, but parallel to a driver you could go for a simple "elko" (as they're called here...) however in series it would surely be better to go for PP (MKP)... __________________ Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......


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13th March 2007, 10:31 AM	#6
kmj diyAudio Member Join Date: Feb 2004 Location: Falkenberg	In this case it is going to be in the lowpass so I think I'll go with a bipolar electrolytic cap with a better 1uF MKP in parallell. I have some nice ones from Sprague lying around. How does that sound? Incidently, thats what the designer recommends even if he uses 2x33uF MKP in his prototype __________________ .....Where the music comes to die.

13th March 2007, 11:07 AM	#7
v-bro diyAudio Member Join Date: May 2006	Wouldn't be surprised either if the results are even better with the bipolar electrolytic caps, but I'm not sure whether the addition of a 1uF cap will add much to the soundquality, I've read a lot of opinions saying the lower loss of high grade caps can work out negatively in parallel (low pass)...

13th March 2007, 11:08 AM	#8
v-bro diyAudio Member Join Date: May 2006	I think you should try and give your opinion here...

13th March 2007, 11:09 AM	#9
kmj diyAudio Member Join Date: Feb 2004 Location: Falkenberg	Ok, I'll go with the bipolar and when everything is OK I can always test other combinations. Thanks for the advice. __________________ .....Where the music comes to die.

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