I think that is a good point, performace in situ is all that really matters. You really have to just try them in your system. Of course I have also tweaked and tuned my system with the old oil caps in situ, so the new Jupiter caps do not have the benefit of that experimentation at this point.
I remember listening to identical brand caps of different sizes (or voltage) and finding that sometimes they sound very different (and not a simple function of -3db cutoff). The 600v Hovlands sounded a lot better than equal value 400v Hovland versions.
J-ROB wrote:
Gudeman caps can be decent. There is no real ranking outside of performance in situ.
It wouldn't surprise me a bit if they are better than Jupiters in some ways. Why should Jupiter caps be great (think they are electrocube mfr)?
I would put a 1-2uf Russian KBG cap in there if forced to pick something I could snag offa ebay any day of the week.
If it is a CF, parallel a couple low volt 0.25 KBGs...I can slip you 4 if you want to experiment. I have some 2uf KBGs also.
These are not too dark and thick, just right.
Or a Sprague Vitamin Q 196P 0.47-1uf from the obsolete vintage cap sector, still one of my preferred parts after 30+ years of cap swapping.
I'd pay $150 for a cap, but it would have to be delivered by a cute young woman naked except for a fur coat, carrying a bottle of single malt scotch. And I would still demand a 30 day return privilege.
But that's just how I roll...
PS: Have you tried that Gudeman in your furnace?