On the recommendation of Israel Blume at Coincident, I upgraded my Shuguang Black Bottle 300Bs to the Psvane Acme Supreme 300Bs for use in my Frankenstein monoblocks a few months ago. It’s the best 300B I’ve ever heard. Out of the box they were superior to the Sophia Electric Royal Princess. Unfortunately the Princesses never had a chance to break in because they failed in the Frankensteins after about 2 weeks. If you have Frankensteins don’t put Sophia Electric tubes in it. Anyway, the Acme Supremes are dead quiet, with the most refined treble I have ever experienced in my system. Midrange is spot-on, not overly projected or prominent and not recessed. Detailed and colorful, much more so than the Black Bottle Shuguangs which are great sounding and reliable, but totally outclassed by the Acme Supreme which they should be at the price. Before break in the bass sounds a bit light, but after about 2-4 weeks that goes away and the bass comes on like a ton of bricks, but in a good way. Excellent balance from top to bottom, but for me the high frequency reproduction was the real ear-opener. I pre-ordered a pair of the new WE 300B’s so I’ll be able to compare the two. Western Electric has their work cut out for them. The Acme Supreme is as good as a 300B needs to be. I haven’t heard the Takatsuki, but it’s $1500 just like the new WE. I got my Acme Supremes for $1000 but they might be a little more expensive now. I’ll compare it to the WE, but I just might be done with 300B upgrades. They’re good. IB was right again.