[Linlai™ Global] E-6SN7 with Cary SLP-05 Pre:

Posted Posted in - 6SN7 Tube Purchase Guide, - 6SN7 / CV181, Reviews by Tube Model

Below is review submitted by professional reviewer Robert Grossman (with EnjoytheMusic.com e-zine):

Larger tubes produce a bigger sound; premium tubes create a higher-quality sound…


I’ve been using LinLai tubes in several amps and preamps over the past five years. I offer some perspectives and listening experiences after recently returning to test and hearing the stock Electro-Harmonix 6SN7 tubes in the Cary SLP-05 preamplifier in comparison to the LinLai Global E-6SN7 tubes.

When I purchased the Cary preamplifier about six months ago, I initially burned it in with the stock Electro-Harmonix tubes for about 200 hours. Upon hearing the beautiful, articulate sound of this preamp design, it was time to try other 6SN7 tubes to explore further sound qualities. My first choice was to try the mid-1950s RCA side-getter tubes, since I had heard from a tube seller who had sold many of them to other Cary equipment owners. These were more powerful and engaging-sounding tubes that presented the music’s low end quite well compared to the stock provided Electro-Harmonix tubes. However, the robust sound of the RCA tubes came at the expense of losing a sweet, balanced midrange. I decided to get a quad of matched Linlai (Global) tubes after two months of using the RCA. The Cary preamp uses six tubes, but I had a pair of Linlai (Global) tubes left over from when I used an Aric Motherload XL preamplifier. Because of the LinLai (Global) tube’s reputation for reliability and longevity, that pair could be repurposed into the 5th and 6th sockets of the Cary preamp. I had successfully used the Linlai (Global) tubes in the Aric preamp to achieve a beautiful, balanced, and rich musical result. Now I figured getting another quad to go with the pair that was here would bring the Cary preamp to life, closer to hearing live musicians.

I am a retired bassoonist and was the principal librarian of The Philadelphia Orchestra for 40 years. My endeavors at home these days in retirement are focused on recreating sound in the most musical ways possible. I continue to collect, clean, grade the vinyl condition, and organize the 20,000 recordings here at home, which has been a lifelong pursuit.

The Linlai Global tubes have gone another step in achieving my goals. Once I seated them and turned on the preamp, their jumbo size really stood out! My eyes were surprised at the authoritative and distinguished look, while my ears took notice of the new and bigger sound. These tubes presented all the usual attributes in the narrative of creating a greater realm of reality. There was a greater sense of depth and fullness in the sound that wasn’t just occurring from simply turning up the volume. The quality of
musical resolution, depth of field, and soundstage were clearer and more realistic. With orchestra records, the musical landscape was larger and more resonant, so the acoustical space of a concert hall could be more clearly reproduced and heard, with a greater sense of body in the space. With chamber music, the individual voices and placement of the musicians were better defined, so the perspective of the two violins, viola, and cello in a string quartet felt present in the room with the soundstage image of the Quad 63 speakers. Listening to my bassoon teacher in the Philadelphia Woodwind Quintet record on Columbia Masterworks ML 5613, Sol Schoenbach stood out more while also blending dynamically with the flute, oboe, clarinet, and French horn. This is because the LinLai tubes enabled the Cary preamplifier to convey details and timbre so accurately that my ears found the sound presentations of musicians I personally know to be more realistic.

I love playing piano recordings and find their presentation to be an extremely important test for hearing the interpretations and techniques of the pianists. What could be simpler and more complex at the same time than properly portraying the size, strength, and dynamic depths of a grand piano? I heard them many times, as concert artists performed with The Philadelphia Orchestra or as they warmed up backstage. In this demo, there was a sense of intimacy and vitality as I listened to my former music director play Mozart’s piano sonatas on the DG 7 LP box set 2720-092. I used to hear Maestro Eschenbach practicing when I went into his studio to deliver scores and pick up music for our rehearsals and concerts. These Linlai (Global) tubes allow me to relax and hear the music better while thinking less about the stereo’s technical and analytical aspects.

It takes high-quality, well-designed, and well-manufactured tubes to bring out the very best in a preamp’s contribution to the important beginning of sound amplification for a music system. I know about sound as a musician who has practiced relentlessly, rehearsed countless times, and performed hundreds of concerts since I was a little kid. I looked up technical information and found that some actual construction and design features for achieving musical results involve tubes with larger glass envelopes and larger plates, which allow electrons to flow more effectively. From correspondence and discussions with Rachel at Grant Fidelity, I can tell she has passion, dedication, and a commitment to providing the finest tubes for her customers. She has helped me gain a better understanding of tube choices and results, expanding the performance levels achieved in my systems over the years as I have changed equipment. Thanks for all the recommendations and for supplying premium-quality tubes.”

Robert’s equipment picture showcasing the large Linlai Global E-6SN7 tubes in Cary SLP-05 pre-amplifier:

GF-Select 6SN7SE MKII: ‘Totally incredible details in the sound stage and voices’

Posted Posted in - 6SN7 / CV181, - 6SN7 Tube Purchase Guide, - GF-Select 6SN7SE Tubes, Purchase Guide, Reviews by Tube Model

Feedback we received from a recent customer Donald M. via email, which includes comparison between ‘GF-Select 6SN7SE MKII vs. Psvane Summit 6SN7’:

“I just wanted to tell you about the tubes (6SN7SE MKII) that I got from you. I have around 30 6SN7’S and CV181-Z’S old and new. I also have a pair of Psvane Summit 6SN7‘S. The Psvanes are louzy sounding, very scratchy. The best sounding tube’s that I have are the Shuguang CV181-Z’S. The amp that I using with your tubes is a 300B single ended class A amp I built about eight months ago. It’s number eleven amp that I built over the past 60 year’s. I now have eight hours of burn-in time and me and my wife both can’t believe how awesome it is sounding with these tubes. Totally incredible details in the sound stage and voices. I’m telling a friend about them so that he can get a pair of them. Thanks again for all your help.”

Treasure 6SN7SE Globe: ‘I got the chills from this thing’

Posted Posted in - 6SN7 / CV181, Reviews by Tube Model

Feedback received from customer Noah via email:

“Hey there, I just received a Treasure Globe  6SN7-SE

I dropped it in my (Schiit) LYR+ / BIFROST and I’ve been listening to it on my (Sennheiser) HD800S. This thing is mind blowing – thanks for selling such a great tube in Canada.
I got the chills from this thing. It completely evens out the tone of these headphones while still keeping a massive soundstage. I have been using them for every genre and it all sounds good, as long as it was mastered well.  I’m going to have to get more spares . . .  “

‘Treasure 6SN7-SE GF Special Edition’ – ‘better than ANY tubes I have ever used!’

Posted Posted in - 6SN7 / CV181, Reviews by Tube Model

Mark S. acquired a pair of Grant Fidelity special edition Treasure 6SN7SE top grade with us recently for his Moon Audio Dragon Inspire IHA-1 Tube Headphone Amp. Below is his feedback via email. We hope this will help other headphone amp owners when choosing upgrade 6SN7 tubes!

“Rachel,

Bless your heart! My order of the Globe 6SN7 tubes arrived in just 3 days! (seller note: Mark ordered our Express shipping upgrade for extra cost)

I realize that there is a break in period for the tubes, but they are already better than ANY tubes I have ever used! 

For the first time, my amp has ZERO noise with headphones! I can’t believe it. Also, I have never heard the sound so incredible as it sounds with these tubes!

Thank you so much for your great service and the best tubes I have ever heard!

Very best regards,

Mark”

6SN7SE with HeadFi: Inspire by Dennis Had IHA-1 Dragon Version – ‘The tubes are magnificent.’

Posted Posted in - 6SN7 / CV181, - 6SN7 Tube Purchase Guide, Purchase Guide, Reviews by Tube Model

Feedback received via email from Kirk V. in USA:

“The tubes are magnificent. The change in musical quality is astonishing. This is the best investment I have made after spending thousands to improve the signal path. I cannot believe how much music I have missed until now. 
Kirk”

Linlai™ Global E-6SN7 on Feliks Euforia Headphone amp: from Germany

Posted Posted in - 6SN7 / CV181, - 6SN7 Tube Purchase Guide, Purchase Guide, Reviews by Tube Model

We have just received the feedback below from Greg K from Germany! Greg owns a ‘Feliks Euforia headphone amplifier’ which came with Psvane CV181-TII as driver tubes.

Read about his first impression after swapping to [Linlai™ Global] E-6SN7 for 26hrs – it might help those who wish to know how the E-6SN7 compared to Psvane tubes: (note: Linlai tubes full burn-in will take approximately 100hrs)

“I have now burned in the tubes for a good 26 hours so far.And on the Feliks Euforia, where the Psvane CV181-TII were before, a lot has happened. I listened with the Audeze Lcd 2 C headphones which are quite neutral. And relabelled 6080 Sylvania power tubes which also arrived on Saturday.

Compared to the Linlai Global E-6SN7, the Psvane are quite neutral in sound. I noticed this immediately after the exchange. This is no longer the case with the Lin Lai, they play much warmer.

The bass has increased considerably where before they were bloodless in direct comparison to the Psvane CV181-TII. The good thing about the Linlai is that the mids and highs are relatively unchanged compared to the Psvane CV181-TII. I didn’t notice any loss there, they seem to have gained a bit of sparkle.

They are also more accurate, closer to the music and go a bit deeper in the highs and a bit longer in the low end. Detail resolution is also very good, I like it better than the Psvane tubes.

Vocals are a bit more distant and more central than with the Psvane, or less voice accentuated, which I personally find better.

All in all, they are definitely worth the money and improve the sound of the Feliks Euforia dramatically. Before I was always getting disturbed by something, but that has gone since the first hour since the Linlai have been in. I don’t regret buying them. Much more the Psvane that you can book at Feliks.

It makes the Feliks neutral but cold, with the Linlai it’s just the opposite.

That was my first impression and I know they still need a little time to burn in. But they are getting better by the hour. Linlai has done a really good job. It also shows that after such a short time they are already so open and show the direction they are going in.

I am enthusiastic about the tubes. And I wanted to tell you that much about how good they are in the first hour.

With Kind regards
Greg”

Can your 6SN7 replace my 6SN7GT, 6SN7GTA, 6SN7GTB?

Posted Posted in - 6SN7 / CV181, - 6SN7 Tube Purchase Guide, Purchase Guide

We sometimes receive amp owners question about tube substitute related to 6SN7. Here is a short summary:

  1. GT stands for ‘Glass Tube’.
  2. GTA is an enhanced version of original GT version – to allow higher plate dissipation than the GT version.
  3. GTB is variant of GTA, with a heater warmer control to further enhance reliability when this tube was used in TVs.
  4. Very early 6SN7 tubes can handle max 300V. Today’s new production 6SN7 tubes can handle max 450V.
  5. In short, new production 6SN7 can replace your old 6SN7 without frying the tubes. But you should not use a NOS 6SN7 designed to handle 300V, into a modern circuit of 450V.
  6. All our listed 6SN7 tubes (no matter what suffix it has) can electronically replace 6SN7GT, 6SN7GTA, and 6SN7GTB.
  7. Do check dimension clearance to make sure the different glass bulb shape can fit into your amp space!

Happy tube rolling!

6SN7SE Globe Tube Tips – ‘You Raise Me Up’

Posted Posted in - 6SN7 / CV181, - 6SN7 Tube Purchase Guide, Purchase Guide

Some amps have preamp 6SN7 tubes placed in a very tight real estate – i.e. two tubes are placed very closely to each other so the new high end 6SN7 with curved larger / wider glass enclosure cannot fit in side by side.

A customer from Europe recently told me his solution and I think it is worthwhile to share! That is – use a socket saver to raise one of the tubes up!

Just google ‘8 pin socket saver’ (not ‘socket adapter’ which may change pin layout connections) and make sure to purchase from a reputable audio parts vendor. Some lower quality socket saver can introduce current leakage to your circuit and cause unexpected noise issues.

Happy Listening!

6SN7SE Globe – ‘The SE blows them all out of the water’

Posted Posted in - 6SN7 / CV181, Reviews by Tube Model

Feedback received from Craig M. on GF Special Edition – Treasure 6SN7SE Globe:

“Rachel,
I got my SE’s today!  I must say … I have spent a LOT of money on boutique 6SN7 variants and I have never heard anything like this before!  I am running a DIY 6SN7 line stage that was designed by Jack Elliano of Electra-Print.  This is by far the best 6SN7 I have ever heard.  I have NOS Sylvania Bad Boys, TJ, Black Treasure, various JAN and there is NO comparison!  The SE blows them all out of the water…”

6SN7SE: “stunning life -live -like music. HUGE soundstage”

Posted Posted in - 6SN7 / CV181, Reviews by Tube Model

Feedback received via email from customer Lincoln W.:

“Hi Rachel, I thought I’d give you a preliminary feedback on the Treasure Globe 6SN7-SE.  they are simply amazing. A pair makes the entire system sound like a brand new system! stunning life -live -like music. HUGE soundstage. I’m running a DAC that already made the soundstage big, but the tubes gave it more depth, the soundstage became bigger.  lots of air, lots of presence…the music produced was jaw dropping – arms up in the air moments. and there were many!”

(note: Lincoln uses 6SN7SE in a Supratek preamplifier)