South43, what I found with the InfiniCaps as far as sound id that they seem to preserve transient and harmonic informaiton very well. There are also different series of these that have different sonic signatures. I think it would depend on the aplication which one you choose. I have used them in two different projects(mono tube amps where I used the signature "D" type & an ARC SP9 where I chose to use the "S" and some of the now discontinued SETI types) where I replaced other poly type caps. In both cases they gave me a more focused well defined sound with lots of harmonic richness, without being at all edgy. As far as burn in they seem to get up to speed quite quickly but may depend on the size of the caps you are using. Are you aware of the new TRT DynamiCaps? TRT does say that you will set a softer overall sound with the orientation in the reverse of what Bigtee described in his first post.
