No, in most cases they have simply reinforced what I initially suspected. Almost all the things I've tested have been accessories / tweaks, e.g. cables, tubes etc. I found it very easy to tell say NAC A5 from say Kimber 8TC, and similarly easy to tell certain different tubes and interconnects apart. I'm sure the things I could reliably tell apart measure differently, so there is no surprise here at all. The things I'd most like to blind test I've not had the opportunity to, e.g. good examples of different amp types e.g. SS, tube, SET etc and also different speakers, e.g. ESL, mini monitors, big three ways, high efficiency horns etc. I'd really love to do that one.
Tony.
PS I'm probably pretty unique on these forums in that the systems I run actually have little if anything to do with what I feel is 'best', I'm just going through a phase of playing about with some classic vintage kit, though I make no outlandish claims for it. I'm just enjoying myself and I hope no one reads anything ideological into any of this. Truth be told I'd be just as happy with say a new NAS, Sugden, Harbeth system or whatever. I'm developing a bit of an itch to try some Quad ESLs next...