I used the .47 uf Supremes as coupling caps in my 300b mono blocks.
They are very nice.
I am in the process of putting together an order for my tweeter and midrange crossovers.
At about $300.00 for each speaker I am really hoping they do for the speakers what they have done for the amps.
Buying the Mundorf’s has ruined me for other caps. It would be nice if they went up higher than 10uf. 15 uf would be very nice, but very large I‘m sure.
In the future I will be using them anywhere I reasonably can.
For now...I scheme and plot... to acquire the 160 or so, 10 uf caps it would take to do my woofers over.
Currently I am busy making a sign that reads
"will work for capacitors".
They are very nice.
I am in the process of putting together an order for my tweeter and midrange crossovers.
At about $300.00 for each speaker I am really hoping they do for the speakers what they have done for the amps.
Buying the Mundorf’s has ruined me for other caps. It would be nice if they went up higher than 10uf. 15 uf would be very nice, but very large I‘m sure.
In the future I will be using them anywhere I reasonably can.
For now...I scheme and plot... to acquire the 160 or so, 10 uf caps it would take to do my woofers over.
Currently I am busy making a sign that reads
"will work for capacitors".
Best Caps
Note not all cap are design for using in speakers. When selecting a cap for a speaker you should be looking for a cap capable of handing high currents. Polypropylene come with different film thickness and the thicker film being better for high current.
These are some of the best caps sold in the US.
TRT's DynamiCap: metallized capacitors Low current signal Cap
Reliable Capacitor: Polystyrene & Polypropylene Foil Makes: High Current and small signal.
Crescendo’s Polystyrene: Foil and Metallized High Current speakers and small signal.
Component Research Corporation, CRC Teflon & Polystyrene and Polypropylene Small signal
Hovland Film & Aluminum Foil Polypropylene High Current.
Sprague 735P: Polypropylene Tubes and Small Signal.
I have tryed all these cap and the are much better than the Wima's, Roderstien.
I just have not tried motor starter caps in speakers seems to strange, with their funky size poor lugs. I'll stay with quality film for signals
Note not all cap are design for using in speakers. When selecting a cap for a speaker you should be looking for a cap capable of handing high currents. Polypropylene come with different film thickness and the thicker film being better for high current.
These are some of the best caps sold in the US.
TRT's DynamiCap: metallized capacitors Low current signal Cap
Reliable Capacitor: Polystyrene & Polypropylene Foil Makes: High Current and small signal.
Crescendo’s Polystyrene: Foil and Metallized High Current speakers and small signal.
Component Research Corporation, CRC Teflon & Polystyrene and Polypropylene Small signal
Hovland Film & Aluminum Foil Polypropylene High Current.
Sprague 735P: Polypropylene Tubes and Small Signal.
I have tryed all these cap and the are much better than the Wima's, Roderstien.
I just have not tried motor starter caps in speakers seems to strange, with their funky size poor lugs. I'll stay with quality film for signals
Has anyone tried caps from Electronic Concepts? They make some omnsters called "Unlytics", because they have such large values. One is 600uF at 300V with 58A current rating. Check it out:
http://www.eci-capacitors.com/ECI_ul30_data.htm
http://www.eci-capacitors.com/ECI_ul30_data.htm
tom1356 said:
The standard/cheaper Mundorf supreme are availeble up to 22uf, at least in Norway. But the silver/oil doesn't go higher than 10uf.
I've used the Mcap supreme (not silver/oil) in my Seas Thor speakers, and I've experienced a big difference. All in all my speakers became better at all freq.
- Christer
ECI Standard Product
Tony Salsich,
For audio ECI make caps that are designed more for the switching power supplies. The METALLIZED POLYPROPYLENE should be ok, however you will not need such hi current caps for most audio designs. However, in might be interesting to replace the electrolytic caps in a tube amp with their high current high voltage polypropylene. Other applications would be transistor amps as bypass caps and maybe in speakers. Normally switch mode power supply caps have very low ESR and good high frequency performance.
Having said that, stay away from the polycarbonate and the polyester caps for any signal applications. The polycarbonates are hydro-microscopic and they will soak up moisture and become a problem.
Tony Salsich,
For audio ECI make caps that are designed more for the switching power supplies. The METALLIZED POLYPROPYLENE should be ok, however you will not need such hi current caps for most audio designs. However, in might be interesting to replace the electrolytic caps in a tube amp with their high current high voltage polypropylene. Other applications would be transistor amps as bypass caps and maybe in speakers. Normally switch mode power supply caps have very low ESR and good high frequency performance.
Having said that, stay away from the polycarbonate and the polyester caps for any signal applications. The polycarbonates are hydro-microscopic and they will soak up moisture and become a problem.
Frank,
The polycarbonate caps are spiral wound unlike a CD, if the cap end get open, even with super small gaps they will soak up moisture. It’s just a problem with polycarbonate material. In the past, I have had to toss out thousands of dollars worth of these caps when the ends were not sealed perfectly. At the time, I was designing filters and amps for the Seismic industry in Houston TX, high moisture area.
You could bridge them when new and they be fine, but after they went into the temp cycle in the temp chamber the went to hell. The THD and non linearity’s increased severely. I don't see this applyies to CD's.
The polycarbonate caps are spiral wound unlike a CD, if the cap end get open, even with super small gaps they will soak up moisture. It’s just a problem with polycarbonate material. In the past, I have had to toss out thousands of dollars worth of these caps when the ends were not sealed perfectly. At the time, I was designing filters and amps for the Seismic industry in Houston TX, high moisture area.
You could bridge them when new and they be fine, but after they went into the temp cycle in the temp chamber the went to hell. The THD and non linearity’s increased severely. I don't see this applyies to CD's.
Hi,
Hey, Jim,
O.K., but this is a severe manufacturing fault.
While I certainly agree that polycarbonate is more hygroscopic than, say, polypropylene, I 've never heard of this fault condition
in audio gear.
Polycarbonate caps are still manufactured worldwide and I know quite a few audio designer that use alot of them because they prefer the way they sound.
Cheers,
Hey, Jim,
O.K., but this is a severe manufacturing fault.
While I certainly agree that polycarbonate is more hygroscopic than, say, polypropylene, I 've never heard of this fault condition
in audio gear.
Polycarbonate caps are still manufactured worldwide and I know quite a few audio designer that use alot of them because they prefer the way they sound.
Cheers,
Frank,
Yes most of the problems we could associate to the manufacturing process of F-Dyne Capacitors. However it's is still a problems with associated to polycarb material. Therefore, they only way we were fining these problems before they went to the field were by using the temperature chamber.
The Seismic systems would automatically run an impulse test, getting FFT of the system's analog performance before it would collect start to data. So, having this type of failure in the field is just not acceptable in the Seismic industry when the cost or extreme and the equipment costs extreme.
Armed with this info I take no chances on polycarbs. The only reason we used these caps is because of their size and performance. There performance is OK it not up to the better film caps. Anyway, I would not use them in audio.
Yes most of the problems we could associate to the manufacturing process of F-Dyne Capacitors. However it's is still a problems with associated to polycarb material. Therefore, they only way we were fining these problems before they went to the field were by using the temperature chamber.
The Seismic systems would automatically run an impulse test, getting FFT of the system's analog performance before it would collect start to data. So, having this type of failure in the field is just not acceptable in the Seismic industry when the cost or extreme and the equipment costs extreme.
Armed with this info I take no chances on polycarbs. The only reason we used these caps is because of their size and performance. There performance is OK it not up to the better film caps. Anyway, I would not use them in audio.
Sorry Frank but that is not true. Production is scarce. I agree 100 % about the soundquality. There is nothing wrong with quality manufactured MKC.
It will be a problem obtaining polycarbs because the film is becoming obsolete. Also Styroflex is not produced for the ones that weren't aware ( environmental and heatresistance reasons ).
This is what Wima says about polycarbonate:
Ero polycarbonate sounded right to my ears and they didn't fail. They were of course encapsulated in resin as most quality film caps. Polycarbonate caps are better than MKT ( polyester ) and less good than MKP ( polypropylene ). MKT's are smaller than polycarbonate ( MKC ).
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