Coupling capacitors give warm & sweet sound

Russian K40 PIOs. I just upgraded my ASL with them.
Jim McShane sells them:

jimmcshane@prodigy.net
http://pages.prodigy.net/jimmcshane/

If you're looking for more suggestions, a better place to pose this question is at Tube DIY Asylum

Jensen.. Had em' , okay but weak, a bit pulled back and soft... Mundorf silver oil is the only cap I would go with in this type if you want paper and oil, however they have very large bodys some space restictions and values will not work in some applications, and the fact again who knows if they will hold up under long durations of heat in 10 years put in electronics is not really known...

I have been thru, sonicaps, kimbers, Clarity cap S.A., auricaps, dynamicaps, mundorfs,Hovlands.. teflons, papers, oils, golds etc... More but to much money spent and lesser performance in the end..

Best overall cap, with excellent value(reasonable priced), size that should fit most, and soundstage with very warm yet very dynamic sounding from what I have heard in a single configuration... Jantzen superior caps. I highly suggest reading this link:

http://www.humblehomemadehifi.com/Cap.html

Every cap is rated, and believe it or not from all the ones I have tried these are pretty dead on results of the sounds and costs...

It's well worth browsing through this Audio Asylum forum:
My Capacitor comparisons: Mundorfs, VCap, Sonicap Platinum, Auricap, etc