Shuguang Black Treasure CV181-Z

I feel compelled to post here, having just replaced a stock Electro-Harmonix 6SN7 with a Shuguang Treasure CV181-Z this morning in my Blue Circle DAR integrated. 

Good lord.

Probably the best $120 I have spent on my system. Massively improved sound staging, instrument separation, timbral accuracy...even power in the low end. 

I'm actually kind of giddy sitting here listening. I knew things would get better, but this has been a revelation. YMMV, of course, but boy howdy...
If you like the Shuguang, you should try the Psvane CV181-TII tubes.
Yes, the Psvane CV181-TII's are incredible.
It is my understanding that Psvane is the offshoot of Shuguang.
I have several pairs of the Shuguang CV181-Z, the Shuguang CV181-T and the Psvane CV181-TII.

I prefer the Shuguang CV181-"Z" in everything I’ve tried so far. Best 6SN7 out there, IHMO.  I found the "T" series to be just a tad to bright for my tastes.  Most listeners would say they had more detail, but to my ears, that also means brighter.

I also really like the Sophia Electric 6SN7.

Info on the difference between the two companies:

Look at these new limited edition 6SN7 tubes! I might have to try a pair of these babies:
Thanks for the comments and info, guys. Yes, Mofi, these are the Zs and they seem to open and deepen with every passing hour. I contemplated the Sophias but took a chance with the Zs...glad I did. 

And in case it's unclear, I have no vested interest in saying such things...I'm just kind of dumbfounded at how much of a difference one tube has made.  It sounds like a completely different amplifier...
I have the Z in a Modwright Oppo 105 am very pleased. Rolled a few well thought of vintage tubes and the Z is my choice. 
I have looked at the new Globe as well. The cost is sobering but the Z sounds so good it's easy to just ignore the new globe. For now..... Stupid hobby.
Love the Shuguang's but they got noisy after a few months.  Went to the Psvane's which I found to be a real close second to Shuguang and weren't nearly as noisy.  Got tired of the noise and went solid state.


Discoveries as you experienced are what make audio such an interesting hobby. In addition to experimenting with driver tubes,  there is a lot of potential improvement in trying a variety of audio grade fuses and audio grade wall A/C outlets.

Congratulations on the Black Treasures sounding so good in your system.

David Pritchard 

Old discussion, but thought i would elicit feedback - I want to replace the stock 6SN7 tubes in my preamp, but I'm unsure if I should go the NOS route or the "new Chinese" tubes? I'm leaning towards the Black Treasure CV-181-Z, but I would appreciate feedback from anyone who has had the BT tubes in a preamp for any extended period of time. At the prices being asked of these (and solid NOS tubes) I don't want to head down the wrong path - very expensive to recover from the wrong decision. My other option would be 1940s Sylvania black base (non-metal base) NOS tubes.

Thoughts . . . . ?
I have a pair of the BT CV-181-Z and I prefer the Sylvania's of course that could change depending on preamp. The manufacturer of my favorite preamp just changed the circuit and added a jumper so that I can use 6NS7 or 12SN7's. I have found an abundance of NOS 12SN7 tubes at far lower prices. I got a great deal on 40's Sylvania bad boys and Tung-Sol Black Glass Round Plate Oval Mica.
Hi msgtrlsmith – I can't speak to a comparison with Sylvanias, but I can tell you that the Black Treasures trounced the gold pin EH 6sn7s that were originally in my Blue the point where it sounded like a different amp (in a good way): better sound staging, more air, sweeter treble, more precise imaging...and on and on. In every way that matters to me, the  BTs were noticeably better – as they should be, for 3X the price of the gold pins. But I've never regretted the was a no brainer for my system. Just be aware that the BTs are significantly larger than stock 6sn7s...make sure your preamp can accommodate. I had to have my chassis altered to enable me to use them...but it was worth it. 
Another strong endorsement for the Black Treasure "Z" tubes. More musical, dimensional, and transparent than the Sylvania Chrome Domes and Sophia 6SN7's I used prior in my MW 5400ES.

Thanks, mdemaio - I appreciate the feedback - think it's the BT "Z" for me and my Cary Audio SLP-05. Yes, all info I find online points to the BT "Z"s all fitting atop the SLP-05 without modification. I'll revisit this thread and post results once installed and broken-in.