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Capacitor Questions Re-capping Dahlquist DQ-20s

I'd like to re-cap my Dahlquist DQ-20s, but I'm running into some problems finding replacements with the same values, especially among higher-end capacitors.

For instance, one of the specified caps in the crossover is "14.5 µF", but I've not found a single one of those online. There are plenty of 15µF capacitors though. Will that substitution work? I have the same questions about 3.0 vs 3.3 and 5.0 vs 4.7/5.6 which are way more common.

Finally, if anyone has done these specific speakers, would you mind sharing what you used and how you liked the results?

Thanks for reading!
joelv

Showing 3 responses by rodman99999

rodman99999
6,206 posts
 
Look at the list of Solen and AEON caps, on page 6 of the
following catalog: (http://www.percyaudio.com/Catalog.pdf)
Most capacitors are manufactured to a +/- 10 or 20% tolerance.
If you call Michael Percy, he can match caps to within a 2%
tolerance, as well as find you the values you need. A very
helpful person.
rodman99999
6,206 posts
 
15uF is less than plus 10% of 14.5uF and would sound more coherent than paralleling caps of different values. Jon Dahlquist's claim to fame was always time and phase coherent systems. It would be a shame to compromise that, by mixing the time constants of differing caps. I'll bet Percy could find caps, in his inventory, very close to 14.5uF(if not right on).
rodman99999
6,206 posts
 
Three capacitors of matched brand, capacitance and voltage
would share the same time constant, and should not result in
any aberrations. Another subject that might be of interest;
observe the outer foil of the caps you use, and orient them as
mentioned in point 3, of the following article: (http://www.audience-av.com/capacitors/a_applications.html) Another service that Percy offers, is marking the outer foils of caps he provides.
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