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In Reply to: RE: Vishay and Wima DC Link Caps in H.E. speaker Crossovers posted by drlowmu on March 10, 2017 at 23:44:15
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.
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
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