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Old 16th March 2011, 02:03 AM   #1
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Question Polypropylene Mega Cap??

Does anyone have any information on these capacitors? The big yellow one in the image?
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Old 16th March 2011, 02:18 AM   #2
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There's an Evans Capacitor company in Providence, RI that has a product called Mega Cap.
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Old 16th March 2011, 04:23 AM   #3
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Originally Posted by speakerdoctor View Post
There's an Evans Capacitor company in Providence, RI that has a product called Mega Cap.

Thanks for the info. I went through their site and found nothing similar.
Evans Capacitor Company -- High Energy Tantalum Capacitors

There is also TDK that makes a Mega Cap. I found nothing similar on their site as well.

TDK Corporation - Americas

Im going to try sending off an email to both
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Old 16th March 2011, 04:31 AM   #4
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Originally Posted by speakerdoctor View Post
There's an Evans Capacitor company in Providence, RI that has a product called Mega Cap.

I wanna upgrade the caps on my crossover In my Energy speakers.I wanna get a rough idea of the quality of these caps. I was told by a local speaker guy that their probably bulk caps and not worth much.
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Old 16th March 2011, 04:42 AM   #5
jcx is offline jcx  United States
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any film is way better than the electros - polypropylene is one of the better film dielectrics - I would say these are the last caps to replace on that XO board even if you believe "capacitor sound" is in any way significant compared to driver quality and actual XO filter response
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Old 16th March 2011, 05:20 PM   #6
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Originally Posted by MilesOttawa View Post
I wanna upgrade the caps on my crossover In my Energy speakers.I wanna get a rough idea of the quality of these caps. I was told by a local speaker guy that their probably bulk caps and not worth much.
I'll update the energy xo upgrade thread soon... but let me tell you they are completely different speakers after replacing all the signal caps in the mid/highs! (in addition to the signal resistors & inductors)

you don't have to "squint" to hear the diffs, they are utterly different, I am very excited about it-- they might as well *be* another set of speakers for how fundamentally the sound changed

energy veritas 2.2i crossover project

in the attached pic, the two 5uF signal caps to the tweeter are replaced, and the single 6uF cap for the midrange, underneath those the resistors are also replaced with mundorf supremes

the other pic shows it before the tweeter caps were on, you can see the resistors
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File Type: jpg veritas_xo_mundorf1.JPG (136.4 KB, 297 views)
File Type: jpg veritas_xo0_mundorf_mids.JPG (196.2 KB, 273 views)

Last edited by sckramer; 16th March 2011 at 05:43 PM.
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Old 16th March 2011, 05:39 PM   #7
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Originally Posted by jcx View Post
any film is way better than the electros - polypropylene is one of the better film dielectrics - I would say these are the last caps to replace on that XO board even if you believe "capacitor sound" is in any way significant compared to driver quality and actual XO filter response
The electolytic caps are not in the signal path, the only point i'd see to replace them is for reliability, electrolytics tend to wear out.

The capacitor sound ended up being *very* significant on these speakers.

The difference in sound is hard to describe, it's like the original caps emphasised all the fine details, so they got in their own way-- now that emphasis is gone, and you can hear far *more* detail! -- also the sound is freakishly juicy/fluid, the original caps are hashy/grainy compared to these, and I thought *those* were fluid until I heard these! also, now I know what a 3d sound stage sounds like! before it was layered & with depth, but each layer was 2d!

Last edited by sckramer; 16th March 2011 at 06:00 PM.
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Old 16th March 2011, 06:01 PM   #8
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sorry for all the audiophile cliches's -- just trying to honestly describe the diffs

Last edited by sckramer; 16th March 2011 at 06:03 PM.
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Old 16th March 2011, 06:30 PM   #9
SY is offline SY  United States
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Quote:
Originally Posted by sckramer View Post
The electolytic caps are not in the signal path
Where are they, then?
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Old 16th March 2011, 06:46 PM   #10
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Originally Posted by SY View Post
Where are they, then?
in parallel with the speaker driver, and also in this case, in parallel with one of the poly caps... so far less influence on the sound, but yeah there's is maybe a little, you can replace them & listen for diffs

i mis-spoke with "in signal path", meant to say not in series with the speaker driver

Last edited by sckramer; 16th March 2011 at 06:48 PM.
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