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
Joelv, If you can't find the exact values that you need I may be able to have them custom wound at ClarityCap factory. PM if interested.

Dave
ClarityCap North America OEM Sales
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.
You can parallel the closes values to make up 14.5uf =/- 10 % so you should be fine.

As for the smaller caps, tweeter caps? find some that are exact values, 3 3.3, 4.7, 5, 5.6uf are common values, do check out the different brands.
http://dahlquistspeakers.com/
15uf is fine and have them tested and sort for values closer to 14.5uf. Always better to bundle values coming close to 14.5 uf.
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).
Rodmann is right. Many do feel three 5uf caps would sound better however. Some pretty big dollar speakers use this method, but I have not compared.
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.