I have a question for any tube guru's out there. I'm rolling some tubes in my preamp and DAC. I'm switching over to the 6CG7 tubes per Frank Van Alstine's recommendation. I purchased a pair of the very hard to come by NOS Mazda/Brimar's and I am now looking at the NOS RCA's.

My question is, is it worth the extra money to go with these Black Sable cryo treated, matched and balanced tubes

http://www.tubedepot.com/bsct-6cg7-rca-ct.html

or the standard matched and balanced RCA's.

http://tubedepot.com/nos-6cg7-rca.html

Cryo treating sounds like snake oil to me.

Thanks,

Larry