What's the best 6NS7 tube you have tried in your Atma-Sphere MP-3 preamp?

Pindac, I can't speak for your system, of course, but I can tell you that with a little patience, you can make an Atma setup sound so amazing that people wonder how the music is actually being played live for them. And they'll be shocked when someone goes wild on a drum kit, etc. Believe me, there's nothing exaggerated about that. Or the voices can be so tangible that if you stretch your arms, you can almost touch the artist. But that, of course, depends on many factors. I truly believe that with some time and effort, anyone can deliver a performance that ranges from acceptable to truly exceptional.

I've spent a fair bit of time experimenting with 6SN7s in my MA-60.  After considerable trial and error, I've settled on Ray's select in the back outside positions (very alive and clear tubes without a hint of etch or grain), a sylvania chrome dome in the center back position (smooth and clear), and am currently running some NOS tung sols in the front position (very detailed and realistic).  I have a number of Sylvania and RCA tubes that I cycled through before landing on this combination.  I am going to try a pair of Linlai in the front positions, because why not?

I agree with revinylized that the Atma-Spheres can sound glorious with the right combination of tubes and associated equipment.  

@car123 

I haven't tried the Ray, so I have no idea or opinion about it. The Linlai fits well into my setup and what I want to achieve overall. Of course, there are many ways to Rome. In my MA-1, I've combined it with the Melz ribbed anodes (without the holes), as mentioned above. I'm experimenting with the third one. On Monday, I'll be getting a TS T-Plates with black coated anodes for a bit more rounded tones and a slightly warmer midrange. I still have a few candidates for this position, which will put me at the front of the concert hall.

Late to the party but as I’ve reported on some other threads recently the Psvane Summit 6sn7 have worked out very well for me.  They’ve bettered several pricy vintage types I’ve tried.  Front 2 positions in my S30 and even bigger improvement in my MP3.  I.tried the Linlai in my MP3 as well but the DC lights did not turn off so I removed the tubes for fear they could damage the preamp.  Playing around now with the 2nd and 3rd 6sn7 positions in the S30 but as reported by others this could take awhile😵‍💫

@marco1 The DC offset light staying on possibly suggests a defective tube. 

I just received a pair of PSVANE Summits and unfortunately one of them was defective (as indicated by the DC offset light). I'm still waiting on the replacement.

I'm currently using the Linlai Global Elite from Grant Fidelity and that is, without a doubt the best 6SN7 I have heard in my MP3.3. As for the 12AU7s, I have tried out a bunch of them aside from the stock tubes - PSVANE ART series (oddly unbalanced sounding, with a hole in the middle), PSVANE Horizon (very good and a great choice at the price) and Ray Select. The Ray Select to my ears is head and shoulders the best sounding of the bunch. Unfortunately, the same cannot be said for their 6SN7 which were grating and unpleasant to my ears after significant burn in - so much so that I returned them to Apos. I much prefer the stock JJ tubes and it does take a biggish leap to the LinLai or (hopefully) the PSVANE Summit to better them.