Linlai E 6sn7 tubes

I have a suspicion there is an arrangement in place that gives the distribution Partners a reassurance that there Sales opportunities will not be threatened by a undercut when contacting the Factory Direct.

Maybe Linlai does Screen for a select tube to be sold with a Global Logo.

A cost for the service to Screen, addition of a Global Logo and risks of return are calculated as added costs, that are then passed on to the Buyer. Hence, producing a increased value for the tube, that is a protection toward impacting on sales Partners businesses.

Has GF, been more astute in their screening and selecting of tubes ? Surpassing the Global Standard, to receive the status of being awarded to the Top of the Range Tube extraction. 

How does the GF Top Range compare in price to Linlai Global. 

From my evaluation of the previous posts from seasoned 6SN7 users, it does seem most likely,  if a tube is received functioning correctly, the method used to source and purchase is not such a concern, any method chosen will give access to a tube that will make a very good impression.   

The practice of screening tubes for the Western market is most interesting. I think it's highly likely that QC on tubes sold to Grant Fidelity meet more stringent measurements than the Chinese tubes. For instance, transconductance (Gm) and emissions may be held to tighter tolerances such as 2% or 5% between anodes. This would have nothing to do with sonics, but these tubes would have less noise and maybe a longer life. Maybe they are tested for noise and microphonics. 

In the US, dealers such as Upscale and Brent Jessee would charge a higher price for tubes that measured with tighter tolerances.

As for Linlai producing two different designs for different markets, I'm not sure I buy it. As was mentioned earlier, maybe the Chinese tubes are Driver Grade. It's anybody's guess.

I was on another forum and Linlai tubes was being discussed. Here's an excerpt:

I tried both the Linlai E-6sn7 and their less expensive Global Hi-Fi 6sn7 in my amps. I prefer the sound of the Global Hi-Fi version.
The bass is better on that one and the overall tonal balance seemed to be more neutral. The E-6sn7's seemed to accentuate the hi frequency spectrum at the expense of bass (the difference in sound of these tubes can be used to tune your system).
Linlai are making excellent sounding low noise low microphonic 6sn7's.

this is yet another 6SN7 from Linlai.

@ram18. The PSVane UK 6SN7's are bright, clear-sounding tubes.  IMO, they're not a "musical" tube, if that's what you're looking for.  I'm currently running them in a Finale Sesto Elemento FFX (6V6-based amp) running a pair of Horns by Autotech Atmosphere MK2s.  In a larger room, they help the Atmospheres for some reason, and they're a very clear sounding speaker (not muffled at all, nor bright).  In my pair of Horns Mummy's, I don't think I'd try them since the Mummy's reveal everything.  I haven't tried the Linlai's, but the UK's are probably the cleanest, brightest 6SN7 tube I've tried and with a large soundstage.  Brighter sounding than a Sovtek 6SN7, a "sharper" sound (but not in a harsh way).  Definitely "cleaner" than the JJs, Sylvanias, CV181s, GEs, and PSVane globes I've tried.  

@lowrider57 , do you have stock in G/F?

When did you find them? I closed their web page over the weekend & never seen those. ( NICE)

I did some rolling the past few days & I have to say; The Global & the Shuguang Treasure Cv181T sounded better then the 4 Global in my Don Sachs.

@dishawasha  Tks for your impressions of the PSVane Uk 6sn7s.  Guess it has a bright and clean signature and impressive in these aspects. Good that it works with your speakers well. My Klipsch speakers are slightly forward sounding. So adding the PSVane Uk 6sn7s maybe accentuate the brightness further.  Was intending to pair the Uk PSVanes initially with my Linlais. But I believe given the sound signature of the PSVanes, maybe the  current  match of Sylvania GTBs and Linlais may be a better fit with my Klipsch speakers.  Appreciate your feedback.