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Dynaco A-25 crossover capacitor

172.2.113.57

Posted on December 5, 2016 at 15:18:58
Tadlo
Audiophile

Posts: 1925
Location: midwest
Joined: March 8, 2003
I have determined that my lack of tweeter sound in my A-25 is due to a faulty crossover capacitor, so I want to replace it. So what should I get? When I replaced the capacitors in a pair of A-35's about a decade ago I used Solens, but I have since then seen some criticism of Solens as being overly bright. So what should I get? Dayton?

 

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RE: Dynaco A-25 crossover capacitor, posted on December 5, 2016 at 16:06:41
I too used Solens for a number of years. About 6 months ago I switched to Audyn caps and I think they're noticeably less strident than the Solens and cost just a little bit more. You could also consider Clarity caps too.
Of course you can really go berserk with Mundorfs and Janzens, but I'm not sure they're worth the price to use in your A-25's.

 

RE: Dynaco A-25 crossover capacitor, posted on December 5, 2016 at 17:02:03
airtime
Audiophile

Posts: 11287
Location: Arizona
Joined: February 4, 2003
I switched over my solans to these. Excellent clear capacitor. You need to spend a buck or two on that particular capacitor.

I was ready to spend big bucks on getting a Clarity cap and even Madisound recommended I just use these.

 

It looks like a really nice capacitor!, posted on December 5, 2016 at 20:09:09
Crazy Dave
Audiophile

Posts: 14371
Location: East Coast
Joined: October 4, 2001
Given the simplicity of the A-25 crossover, and the effort needed to properly rebuild and A-25, the cost is reasonable.

Dave

 

4.7 Jentzen cap, posted on December 6, 2016 at 10:53:44
Mossback
Audiophile

Posts: 1871
Location: Washington, the State
Joined: November 17, 2001
I replaced the 4.7 cap with a film Jentzen from what others here suggested. The cost was modest.

 

RE: Dynaco A-25 crossover capacitor, posted on December 6, 2016 at 13:12:14
Bold Eagle
Audiophile

Posts: 6936
Location: America's Heartland
Joined: May 27, 2001
I do think Solens are on the bright side; particularly if you are replacing a non-polar electrolytic.

I've had good results with film caps from Dayton, Jantzen Cross Caps (their least expensive), and I did try some Clarity PX with good results.

Jerry

 

RE: Dynaco A-25 crossover capacitor, posted on December 7, 2016 at 07:10:22
sony6060
Audiophile

Posts: 1465
Location: USA
Joined: August 8, 2014
Obbligato paper foil in oil are great capacitors for crossovers. Around $6 each at Parts Connexion.

 

2nd....., posted on December 7, 2016 at 11:05:37
Mossback
Audiophile

Posts: 1871
Location: Washington, the State
Joined: November 17, 2001
Now I remember that you (Bold Eagle) suggested I use the Jantzen and you were correct sounds great.

 

Thanks for all the help., posted on December 7, 2016 at 11:49:45
Tadlo
Audiophile

Posts: 1925
Location: midwest
Joined: March 8, 2003
New Dayton caps are on the way.

 

RE: Dynaco A-25 crossover capacitor, posted on December 8, 2016 at 08:20:05
Tom Bavis
Audiophile

Posts: 961
Location: Upstate NY
Joined: May 25, 2007
Any film cap is likely to be brighter than the original NP electrolytic, due to lower ESR. So you might be turning the treble control down a notch... but mine were used "up" one step from the beginning - got them in 1973 or thereabouts.

 

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