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Hello,Has anyone been experimenting with DC LINK film caps yet, ( Vishay or Wima ) in High Efficiency speaker crossovers?? Would it be possible to hear what your listening results were?? Your conclusions?
Thanks.... in advance !
Jeff Medwin
Edits: 03/11/17Follow Ups:
are there two sections? - or are pairs of terminals internally hooked to each other? Are the caps pretty resistant to soldering and leads sturdy? i tried extending a lead on a Vishay 1uF cap with solid 19AWG copper and broke the cap lead. I know they may be crap but I'll evaluate the 3uF Vishay with a 0.1uF Dayton foil cap bypass.
are you trying the WIMA all by itself at first? Your application will be higher-fi and much better amp than my digital Crowm.
Karlson Evangelist
~!
The Mind has No Firewall~ U.S. Army War College.
I. Background and Procedural History
"Pyranol" is an insulating material once used extensively in electric equipment. Made from polychlorinated biphenyls ("PCBs"), Pyranol was prized for its dielectric properties—i.e., it conducts electricity poorly or not at all—and was widely used in the 1950s and 1960s in the manufacture of transformers, capacitors, and other devices. Time, however, was not kind to Pyranol—as PCBs became associated with serious health risks,1 Pyranol and other products containing these chemicals were stringently regulated and their use in manufacture drastically curtailed. See, e.g., 42 U.S.C. § 9601(14); 15 U.S.C. § 2605(e).
No doubt !! But I believe, its an amp and system wiring problem you are all responding to.When the wiring and audio amp is correct, " dead nuts on ", the PIOs sound " smooth " but ill-defined, mushy, never real. As the system gets better, one will less and less use PIOs. Mark my words !!
Most of audio is sixty years behind the times, on capacitors. There are modern capacitors that way outperform the old stuff, easily. But, I can see from this thread, " I " may be the first to use a 4 Pin WIMA DC LINK , bypassed with other modern caps, in a high efficiency speaker's crossover.
On a good system, A-B a 10 uF or 4 uF DynamiCap 'E" with doctored leads, against ANY PIO cap of the same value in this world. Tell me what sounds best !! Just THAT brand, and just those two values please. Can you find anything, at any price, that does what those two DynamiCaps mentioned do? I don't think so !!
I also employ a 5 uF film cap in power supplies, speaker crossovers, a modern design, that has no peer, versus anything else in existence.
The world of capacitors is NOT standing still. Much of the capacitor design advancements I experience comes from non audio applications, industrial, that we apply to audio. The performance difference, audible, is staggering.
Mark my words, this is the wave of the future !! Caps are the weak link, always were, and those GE97F system " smoothers " are totally outclassed, and they are sixty years behind the times.
Want / need another system " smoother ", add a high frequency horn with a 90 degree bend to it !! Not for me, my tastes, thank you.
Jeff Medwin
Edits: 03/18/17
Ken
If you are using them plastic film in a horn speaker crossover,they can be a little on the bright or hot side. In a power supply,they decent after nice break in.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Still fishing for sales?
no - but it would be cheap for someone with Klipsch Heresy at $2.18 per 2uF cap. A Klipsch Type A network would be ~$13 at Mouser. 12uF is cheaper at Allied but don't see 2uF - two 1uF MKP1848 could be used in parallel and cost about the same as one 2uF cap.
for low loss caps - maybe these are a way to go - ?
MKP1848 AT MOUSER
Karlson Evangelist
Well Fred,
It looks like I get to be first on this Forum to try out WIMA 4 lead DC LINKS on an ALTEC system, or maybe any High Efficiency system, since no one responded, as to having any experience doing this.
It should be WIMAs with four lead outs, not any VISHAYS, which are audibly inferior.
I would not use the 4 lead WIMA DC LINK caps alone, but rather, bypass each of the crossover's cap locations, with multiple lower value (typically under 1 uF ) - small uF value film caps with 0.01 uF being the smallest. No single cap " does it all ", especially midrange through the high end.
Jeff Medwin
hey Jeff - are the Dayton film and foil bypass caps suitable to bypass these WIMA? - I'll order some WIMA and give a whirl on either a fake La Scala or a K-horn with 511B as midhorn. Do you use a heatsink when soldering copper to the DC-Link leads?
Karlson Evangelist
Jeff & others interested,
A company that carries SOTA poly caps is Electronic Concepts. Go to their company's site --it is worth a read !!! These caps are used in multi million dollar medical and high voltage devices etc. The caps are called "unlytic"---look on ebay under both company name and unlytic and you can get some real bargains !!! This company did the science and their products are based on performance. not audiophile BS. I will have soon to be delivered a few 20mf rated at 750 volts for $6.00 each !!!! I also have some vishay high voltage poly caps for my tube power supplies on the way. I doubt you will find a more technically better cap. I know some people who are using these caps in tube power supplies / crossovers and report excellent results. Good luck in the hunt.
what would you suggest to try as bypass caps for the WIMA? what bypass would you suggest for KGB and MBGO caps?
Karlson Evangelist
I'm using the Wima DC link caps in my crossover to the tweeter with no bypass.
They work just fine.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
good - are Vishay's DC link reported as nearly as good? - their values are closer to what I need.
Karlson Evangelist
http://www.ebay.com/itm/322246926313?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
These caps are very hi quality and sound very good, are made in spain!!! cheap too!!!
I can almost guarantee you will not be disappointing plus the seller is a stand up guy.
Or if your into Silver foil capacitors These are a STEEL
http://www.ebay.com/itm/MKP14-Original-New-M-L-Silver-Foil-MKP-Audio-Capacitor-600V-12uF-Axial-Leads/141916952308?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D2%26asc%3D41670%26meid%3Db0852a69c61b4e95aab5e0e121577240%26pid%3D100005%26rk%3D2%26rkt%3D2%26sd%3D322246926313
I feel as though I am reading serial advertisements. Also I don't believe steel is a suitable material for HF caps, even if the caps are a steal.
Nope. Pass on Vishays for audio.4 pin WIMAS, not 2 pin, sound best.
Vishays don't compare favorably to the WIMA. No free lunch.
Jeff Medwin
Edits: 03/17/17
Vashay = all I could find near 3.3uF - might not matter much with Beta10cx - which values of Vishay did you evaluate? what is their signature vs WIMA? ("brittle" ?)
WIMA seems to make these lower values but could not find them stocked
Karlson Evangelist
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