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Application info

Posted by Tweaker81 (A) on November 10, 2004 at 16:29:47

In Reply to: Value of electrolytic capacitors posted by Tweaker81 on November 9, 2004 at 22:39:40:

Hi guys,

Thanks for the advice so far, Al Sekela, pocketchange, & EchoWars.

Here's more information pertaining to my intended application:

I noticed two 220uF 50V bi-polar electrolytic capacitors in a speaker crossover. The speakers were manufactured in 1997.

I am aware of all the arguments against mucking with the capacitors in the crossovers as they are matched to the impedence of the drivers, but this argument is moot if the capacitance value of the electrolytic capacitors decrease over time, or if the ESR of the electrolytic capacitors increase over time.

FWIW, I am considering replacing the two 220uF bi-polar capacitors (12mm x 25mm) in the speakers' passive crossover (3rd Order: 110Hz and 3kHz) with the expensive Black Gate WK 220uF 200V bi-polar capacitors (30mm x 25mm) or the Black Gate NH 220uF 160V bi-polar capacitors (30mm x 25mm).

I do have a capacitance meter (BK Precision 810C: accuracy +/- 0.5% @ 23 C) but if the value of the stock capacitors have deteriorated over time, then it would be impossible to match the replacement capacitors to the original values--which is unknown.

-Tweaker

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