Klipschguy Posted April 20, 2019 Share Posted April 20, 2019 Greetings All, I am planning on replacing the capacitors in my Cornwalls' B Networks. A forum search shows the cap-du-jour is the Arizona Blue Cactus, which as you know, is a Paper/Mylar/Oil/Aluminum Foil capacitor. I was thinking of using two Arizona 2uF in parallel for the 4uF cap, and a single Arizona 2uF cap for the tweeter leg of the circuit. (My understanding is paralleling caps reduces overall ESR vs a single cap of the same design that carries a summed capacitance value.) I do not care that much about the money (within reason). What I do care about is the sound and longevity of the caps. I would like the caps to give 20 to 30 years of good performance (maybe that expectation is unrealistic). I know the subject of capacitors has been discussed ad nauseum on this forum, but I cannot not find much written about sound AND longevity. Any thoughts are appreciated as I am certainly open to ideas. Best regards, Andy Quote Link to comment Share on other sites More sharing options...
Budman Posted April 20, 2019 Share Posted April 20, 2019 Deang is using them on his current builds and i have a set of his AA's with them Quote Link to comment Share on other sites More sharing options...
Deang Posted April 21, 2019 Share Posted April 21, 2019 11 hours ago, Klipschguy said: I know the subject of capacitors has been discussed ad nauseum on this forum, but I cannot not find much written about sound AND longevity ... Yes, paralleling capacitors reduces ESR. However, there is also DA. Original capacitors were paper in oil and later, mylar film in oil. I now stay away from metalized types. They just don't sound as good as film and foil. Caveat - I still use metalized polypropylene in my RF-x rebuilds because of space considerations. A good metalized capacitor still sounds better than an oval shaped capacitor - which is what Klipsch uses in series with the horns in Reference. For longevity, the leads should be internally soldered, something that can't be done with metalized capacitors. The best capacitors are fully protected and/or hermetically sealed film and foils. Arizona, Jupiter, and Miflex all meet that criteria. These will definitely go 30-40 years. Though not fully protected, PPT Theta, MultiCap, and Musicap are outstanding. 1 Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted April 21, 2019 Share Posted April 21, 2019 20 minutes ago, Deang said: there is also DA. Oh, please, not the DA. Quote Link to comment Share on other sites More sharing options...
glens Posted April 21, 2019 Share Posted April 21, 2019 Shouldn't be a problem in a loudspeaker crossover network unless, maybe, there is appreciable DC present at the amplifier output, or one is biasing their capacitors on purpose by other means. Quote Link to comment Share on other sites More sharing options...
Klipschguy Posted April 21, 2019 Author Share Posted April 21, 2019 Thank you, Dean. The information you gave is what I am looking for. Andy Quote Link to comment Share on other sites More sharing options...
JohnA Posted April 24, 2019 Share Posted April 24, 2019 I like Chicago Blues better. Quote Link to comment Share on other sites More sharing options...
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