For what it's worth, cap rollers almost consistently state the Obbligatos are a low-cost sound-alike to mundorf supremes. While I am anxious to use the Obbligatos I have purchased, I am not too interested in cap-rolling (re: frequent desoldering), so I have opted to use mundorfs instead. Pretty stupid of me, really, to waste that money, though it's really not that much.
I think the hype behind "cap sound" and the fact that a small few folks have been less impressed with Obbligatos has kinda made me rethink looking for a cheap alternative to the more tried-and-true, which unfortunately means expensive name-brand caps (then again, a small few folks don't like Mundorfs either). So maybe Obbligatos are just as good, and there's just too many stubborn and unadventurous builders like myself. Or maybe it's like believing in magic.
That said, I obtained and used some Multicap RTXs in my tweeter crossovers, coupled with new tweeter inductors and replacement tweeter diaphragms, and was really impressed. Though I obviously cannot attribute any improvement to one single tweak, I'd say stick to what the engineers and the audiophiles say is an improvement on your average cap.
Cap rolling is hardly ever subject to double-blind studies. All components and the compenents inside them are system-dependant, so without controlled studies, we need to look for mutual corroboration between those who listen closely as well as those who are willing to listen and measure.
The film-and-foil construction of the obbligatos meets the engineering criteria. The rest is up to you.
