Klipschguy Posted April 21, 2019 Share Posted April 21, 2019 Do you all have any thoughts on reforming crossover metallized capacitors using DC voltage? Replacement is probably the better option, but I am curious. Andy Quote Link to comment Share on other sites More sharing options...
WMcD Posted April 21, 2019 Share Posted April 21, 2019 I posted an article regarding reforming electrolytic caps in this thread. But there is no mention of other types. WMcD 2 Quote Link to comment Share on other sites More sharing options...
EMRR Posted April 21, 2019 Share Posted April 21, 2019 I really only think of reforming with electrolytics, not film types. My observation has been that older caps with a lot of mileage may show and/or reform to correct capacitance, but series resistance tends to rise far above that of a new cap, and that is a measurable symptom related to poorer sound. You might not notice it in a hi-Z position, but in a low-Z position it tends to be obvious. 1 Quote Link to comment Share on other sites More sharing options...
Klipschguy Posted April 21, 2019 Author Share Posted April 21, 2019 Thanks, Gil; I found and read the article. I know reforming (including the ongoing, self-healing process of regular use) of electrolytic filter caps is well established and important for good capacitor life, I am just not sure there would be any benefit for metallized crossover caps. Here is a basic, informative article on metallized cap self-healing for anyone who may be interested: https://blog.capacitorfaks.com/the-self-healing-characteristics-of-a-metallized-film-capacitor/ Regards, Andy Quote Link to comment Share on other sites More sharing options...
Klipschguy Posted April 21, 2019 Author Share Posted April 21, 2019 EMRR, Agreed: reforming will not help ESR; if a tired cap has a high ESR, it is at the end of its useful service life. Regards, Andy Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted April 22, 2019 Share Posted April 22, 2019 Reforming? I normally just spank mine… Quote Link to comment Share on other sites More sharing options...
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