Hi Joe.
I’ve not had any problems using higher voltage rated caps as long as the capacitance value is the same; there may even be some benefit with regard to cap life doing this.
What I think can matter is matching the ESR value.
Also, when upgrading crossovers, particularly when changing to polypropylene caps people tend to go for tighter tolerance caps and this isn’t necessarily a good thing particularly with speakers that have had some care taken in the listening and tuning process.
Midrange and hi frequency drivers seem to benefit most from the upgrade to polypropylene caps while the low frequency drivers seem to be happy enough with the speed of decent electrolytics; handy given the price of high capacitance value polypropylene's.
You can of course shop at Hi Fi Collective, but if you fancy saving yourself a few quid these people are good, know about their stock and sell high quality caps but without the audiophile names and price tags.
http://www.audiocap.co.uk/400v-polyp...eries-22-c.asp
So, match capacitance, tolerance and go for something with low ESR values would seem sensible.
Oh arr, if you're going to hardwire the tufnol boards are excellent, they'll even pre drill and sort the layout for you.
http://www.qtasystems.co.uk/crossovers.htm
Last edited by Welder; 15-10-2011 at 22:32.
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-Bertrand Russel
John.