Warn Sound Capacitor

HI,
Humblehomemadehifi has a nice shootout of caps. I like Clarity Caps they do not cost a fortune and sound right. I have used MR and ESA in my preamp, both different. Warmer and rounder of the two is ESA but you can try the better CSA which has more air than ESA.

Clarity CS line is very warm.  So is the Mundorf MKP.

ok then try mundorf the white caps, silvergold, a  bit  pricey, but worth it. 
not sure if they are warm/bright, but they are musical/clean

thank you
so for a very open tweeter which cap do you suggest to tame it ?

I don't know if caps will make enough of a difference.  My understand of Clarity caps is they are a bit more higher resolution and uncolored.  The Mundorf caps may be a little colored/veiled in comparison, but that's a hard call.

Probably the best way to tame a tweeter is to start using a lot of pure copper interconnect / speaker cable and ensuring that the terminations are all gold-plated.  Get rid of any silver or silver-plated elements in your transmission line.  This can also include digital cables, such as S/PDIF COAX or HDMI.