if you like spoky vocal, you shall grab this speaker.National Union Black Glass is decent but not on par with the top rated tubes. I have a pair and like what it does, but it's pretty colored and accentuates the mid range - this might be great in systems that need it. It also lacks transparency.
I suggested the Brimar since you have a lot of 6SN7s and so many datapoints compared to others. Also, based on your music choices, which tend to involve vocals, the Brimar might be a keeper.
For me, transparency is key. If a tube takes that away, I tend to only use it for a flavor change every now and then. I have tubes in all my other components so it's easy to regain the areas that the TSBGRPs fall short.
I still looked into getting the Melz but I couldn't confirm the accuracy of some of the descriptions on eBay. I'd prefer to be patient to get the real deal. There were too many tubes having the same description but at extremely varying pricepoints.
1940's RCA grey glass VT-231 and GT are the same tube. VT-231 was the military designation. You might hear some difference due to tighter tolerances in testing.Trying a set of 1943 smoked glass RCA 6SN7GT in my amp. Definitely more propulsive than metal base Sylvanias and perhaps even better bass than Ken-Rads but definitely not as sweet in the upper registers. Not strident, but not my taste. Have a set of RCA smoked glass VT-231's to compare...
I also like lush and warm sound out of RCA vt231.The RCA smoked glass VT-231's are good...real good. I have a new reference in my application.
1940's RCA grey glass VT-231 and GT are the same tube. VT-231 was the military designation. You might hear some difference due to tighter tolerances in testing.
Both tubes were manufactured at the same time, same place.
If you like deep bass than I recommend you to try 1578 Melz.Thanks for the shootout and the great report Thomas. I happen to be looking for 6SN7s or combos, and this is a great resource. of the tubes you e heard so far, what strikes the best balance between transparency and minimal /no harshness?
Thomas,If you like deep bass than I recommend you to try 1578 Melz.
But if you care for transparency and clean details, then you can try Sylvania vt231.
You may get a pair from Ebay under 150$.
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