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Cryogenic treatment of tubes? Anyone with experience positive or negative?

I just ordered a matched pair of 12au7 mullard NOS tubes for my primaluna amp. Ordered them from upscale audio.  They offered the cryo treatment, so for only 8 bucks more, I got it.

wondering if anyone has done enough listening to have an opinion on the sonic benefits, or the technical reason why it makes (or does not make) a difference.
meiatflask

Showing 2 responses by kdude66

kdude66
1,200 posts
 
I've tried 3 or 4 diff. sets of cryoed tubes in the past and also after very careful comparison I really couldn't tell any difference either.One set of Mullard reissue el34 went fuzzy and noisy in a 2 month period and one tube went completely bad.

Maybe other people have had better experiences with cryoed tubes but I would'nt recommend them.

Kenny.
kdude66
1,200 posts
 
Engineers sometimes think too much. It sounds like he had a close encounter with a Wikipedia page.

Now that's funny,Lol.

Kenny.
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