I clicked on the main page, scrolled down, and found this link to a film made in 1958 to promote RCA’s ’Living Stereo’, so serious https://www.audioasylum.com/audio/general/messages/80/806082.html the film, on youtube |
I am almost certain that best Sylvania and RCA are from 1950s, and the earlier the better. At least, that's what I read, I only have 1950s of both. Don't buy RCA from late 1950s, that's, later than 1956, they are a little dark and closed in; early/mid 1950s 12AU7 RCA sound excellent in my VAC, almost as good as Sylvania long black plates from 1950s. |
The 5751 has about 30% less gain than a 12ax7. But don’t think it in any way translates to less versus more musicality. I know they were also produced for the commercial versus military market. Based on my use, I agree with Joe of Joe’s Tube Lore as they sound better than 12ax7 when used in the line stage of my preamp. I have on hand and have enjoyed a number of brands of NOS 12ax7s but prefer the 5751s. You may have an eye (or ear) opening experience and at a minimum gain insight by trying a good set of Sylvania black plate triple mica or GE black plate triple mica 5751s in your integrated. These have been my favorite brands of the 5751s I have tried. Edit: Or better yet maybe someone who has experience using 5751s in a VAC Avatar SE can chime in with their experience. |
