Cryogenic Treatment of Tubes, and why you should not.

Or you have confirmation bias. Where did you get this $30K benchmark from?

Or is it just an arbitrary number (say yes cause it is) 

If your whole system is below ~$30k, there’s an awful lot you’re not going to be able to hear.

My feeling about cryo’d power tubes is the stress from extreme temperatures weakens or makes brittle, the center alignment plastic guide.

I am in the camp that Cyro (on TUBES) does make a difference. At first I thought how can CRYO process improve the sound. As a side note, where I used to work (Space and Satellite) R&D / Manufacturing, we use CRYO machines to change the metallurgy molecular structures of components for the programs we build. So CRYO is not snake oil, but proven to work for certain Applications, BUT for Music? Hmm.

So, a Friend and I purchased 2 sets of the same tube, one CRYO and one not (SED winged C EL34) and did the proper break in on both tubes. when the time came, we listened and boy, we hear a difference, Not Night and Day difference but there is a difference. 

To me, if you have a resolving system (which we had) CRYO may? make sense. If not resolving enough, dont bother. just like speaker cables and power cables. it all depends on synergy and weakest link.

That's just my opinion.

Machine Tool Cryogenic Treatment

This doesn’t prove anything about audio tubes, but I wouldn’t argue with the proven physics demonstrated in these other applications (above link)

I can certainly see why the more adventurous tube dealers would experiment with cryo. It may be an experiment paid for by the buyers, but the buyers are willing to be experimented with. It's an understandable urge. Some particular resolution of the question may one day rule, and it may have been hinted at by the machine tool manufacturers' experience.

Post gets deleted that explains Cryo. Wow what a dump...