Cryogenic Tubes - Time for a Change

@woodsage Thanks for the input. CryoTone tubes come recommended by Decware so I thought I'd give them a shot. I've got a Decware 25th anniversary Zen amp on order and figured I try them out on my R8 before the Zen arrives. I spoke with the owner of CryoTone who happens to have the same twenty year old Swart guitar amp (5 watt) as I do. After our conversation he offered to sell me a set at 50% off, so I'm essentially getting them at the same price as non-cryogenic tubes. Sometimes my curiosity gets the better of me. 

Over the years, several times I’ve opted for Upscale’s cryo option at $8 a tube. I’ve also opted NOT to cryo for several sets (many of the same tubes). I’ve not noticed any difference with the cryos, other than the cool sticker on the boxes. I no longer order cryo. Their plain “Platinum” grade has always been fantastic, and easily sufficient for my needs. I’ve also tried ARC Select and Kevin’s Stash. All I need is Platinum.

Lower operating temperature and extended tube life "

How can Cryo make a tube run cooler??

I've tried cryo'd tubes in the past, not so much for the cryo, rather for claims of hand picked. I've never had an issue, but can't say for sure I heard any difference in sound quality, don't worry about cryo vs no cryo.

While I don't run EL34 amp anymore, I question quality of new EL34, I have a number of 1990's era Svetlana, last good Svetlana. I've checked into those Decware tubes, other than cryo, nothing special. I'd try to find some NOS EL34 for best sound and durability.

Just to smooth things over for the OP-

Simply trying different BRANDS, and hearing the subtle(sometimes profound, sometimes no) differences is the more reasonable thing to do-especially among us audio weirdos in an internet forum.

Just like many things in audio- thawed out tubes are nothing but another wallet draining, anecdotal exercise. IMHO.

Carry on.