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Tweeter Capacitor Upgrade (Coincident PREs)

Hi all, looking to upgrade the Solen 4.7uF 100V caps that filter the low frequencies out of the Accuton tweeters on my Coincident PREs.  Started by looking at Duelund's, but PartsConnection doesn't even list prices for a lot of the models (or is out of stock) at that value... that motivated me to try and collect some impressions from the group.

Apparently Isreal is using Mundorfs in that position at this point.

As always, thanks for the input.
128x128cal3713
erik_squires
16,128 posts
 
You'll be fine. Just don't solder too close to the cap body.
cal3713's avatar
cal3713 OP
1,421 posts
 
Not so much worried about the capacitors as the accutons... they have such tiny little tabs, so little room for heatsinks.
cal3713's avatar
cal3713 OP
1,421 posts
 
Talked me into it Erik.  Also gives me a chance to play some more in the future if I decide to buy some Jupiters or Duelunds.
beetlemania
834 posts
 
@erik_squires I’m completely rebuilding my XOs. I have CSAs on the coax board and am comparing with and without Multicap RTX bypasses (~1%). I might also try a CMR bypass. Please characterize for me the SQ of Jupiter as a bypass. Thanks.
erik_squires
16,128 posts
 
Hey @beetlemania
The CMR are excellent caps as mains, but above 4.7uF or so they need bypass caps. Below this, I can’t hear any benefit at all. The CMRs are really excellent caps.


My main speakers use a 3rd order hi-pass filter. To my ears, bypassing the larger cap (~ 10uF) they sound less compressed and more natural. I’m afraid it’s been about 2 years since I did this experiment.


@cal3713 Be aware that the CMR caps are physically huge! You don’t want to mount a 20uF directly to a speaker tab.

May be worth it to get some Duelund jumper cable too.


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