You could be right about the 300B-z vs the NOS WE300B. And yes I read the review I think you are talking about, but I think that review was written by the owner of Grant Audio distributor for Shuguang.
One thing I know for sure is that my NOS TS 6SN7GT round plates made a big impact over other 6SN7s and the CV181-z.
I have read comments saying Jack designed are WA5s around the WE300B.
As far as the KR300B goes, its my understanding that after the owners wife took over that company the quality has dropped off the table. I was told that by KRs USA distributor. I also talked to him about the NOS WE300B and he seem to think it was the best of the best.
Ya that picture is worth a lot of words, the guys on the left top and bottom are the guy that is handling the sale and the pres on the bottom.
Worst comes to worst I can sell them.
Originally Posted by monsieurguzel
Yeah I second that also, especially considering that you own a pair of Shuguang 300B-z tubes which are supposed to outperform WE 300B tubes in many respects. Are you just buying them to satisfy a curiosity about them? Otherwise it would seem that there is money better spent elsewhere than buying the rarest most expensive tubes out there (TS Round Plates and WE300B) just because a few people on the internet say they are the "best". I feel that the 'legend' of the WE300B is just that...and people pay exorbitant prices that are in no way related to their performance, but more for their collectible and rarity amongst old audiophiles who still care about that stuff. In the past 10 years there have been so many new manufacturers of 300Bs that in many ways supersede these old designs (ie. EML 300B-XLS, Shuguang 300B-Z, KR Audio 300B, etc, etc.). Same with 6SN7 tubes which might have cost $50 ten years ago cost upward of $500 for the exact same reasons.