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Shootout of Nos 6sn7 tubes

I will have shootout between TS BGRP, RCA vt231, KR vt231, Syl vt231, Raytheon vt 231 and "Bad boy" next weekend.

If I get MELZ 6N8S 6SN7 Metal Base next week, then I will also include it in shootout


RCA5691, Psavne Acme 300B, Psavne Acme 805 are also being used in Line Magnetic 508 amplifier.

Speaker will be Lansche 4.1 with plasma tweeter.

Digital source will be Dave and HMS fed by ripped CD stored in ssd drive of Cocktail audio x30.


I will play

Eva Cassidy's 'Autumn Leaves"

"Trinity Sessionn " by Cowboy Junkies

For classical orchestra, "Trittico" directed by Fennel.

"Still harry after all these years" will be for fusion jazz.

Any more suggestion gentlemen and ladies.

Thomas
128x128shkong78
shkong78's avatar
shkong78 OP
1,485 posts
 
Since I use pair of 6sn7 in LM508 and quad 6sn7 in Freya, i consider ordering more 1578 tubes.

Just out of curiosity, i also had ordered cheap 6n8s tubes for comparison.

https://www.ebay.com/itm/QUAD-FOUR-Matched-Balanced-Russian-6N8S-6SN7-double-triode-TUBE-NEW-NOS/312402083888?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

I do not expect them to be as good as 1578.
shkong78's avatar
shkong78 OP
1,485 posts
 
https://www.ebay.com/itm/273874731266?ul_noapp=true

I placed an order of one more pair of 1578 made in 1980

It will take 6 weeks to get it.

This dealer offer 60 days of return.

After having listed to 1578 for 8 hours, I am convinced this is the King of 6sn7 with nice timber, great bass, wide and deepest soundstage.


TS bgrp is not a bad tube but it is over hyped.
93cobra
16 posts
 
If you like the Melz 1578 from the 80s. Just wait until you get a ear full 
of a pair from the early 70s.  They are that much better..
shkong78's avatar
shkong78 OP
1,485 posts
 
1578 tube made in 1970's will be delivered next Wednesday.

I will find out!

But it is possible that tube made in 80's work better with my system.
shkong78's avatar
shkong78 OP
1,485 posts
 
https://www.ebay.com/itm/Raytheon-JAN-CRP-6SN7GT-VT-231-Vacuum-Tubes-1944-Balanced-Matched-on-Hickok/392787627010?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2

I won this Raytheon Vt231 tube at Ebay auction at 50$ on May 11th.
Including shipping and tax, total cost was 65$ on me.

After receiving this one yesterday, I replaced Melz 1578 with this RT vt213 for examination and comparison purpose this afternoon.

Wow this is the best 65$ that I had spent on audio gadget.
While 1578 sound more dynamic with nice decays, wider soundstage, this RT sound little bit more clean on treble.

The only downside of Melz 1578 is some crackle noise before warmup.

Most of crackle noise is gone after 10 minutes warmup but compared with RT vt231, I noticed slight high frequency noise.

Overall I am still of the opinion that Melz 1578 is the King of 6sn7 with explosive dynamics, deep bass, widest and deepest soundstage.

But valuewise, this Raytheon Vt231 which cost me 65$ is the best value with nice musicality.


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