Sorry to keep pummeling this thread, but just read this on Brent's website: Same amp!
"This is the original 1950s RCA black plate that will never be duplicated. This is probably the last time they will be offered at this price. Good supply now, but when they are gone..... Warm blackplate sound with a nice top end. MATCHED PAIRS ARE JUST $109.00. CLIENT COMMENTS: "Hi Brent, Wanted to give you an update. Tubes arrived just as you said they would. Thanks for being in the business you are in, and running it the way that you do. Changes in my PrimaLuna Dialogue Premium HP are not subtle. Tightened bass, liquid lush (but not syrupy) midrange! Increased height and depth to soundstage. But to me most importantly, the Beryllium tweeters on my beloved Usher BE-718 “Tiny Dancers” are now tamed! What was tizzzz is now sustained shimmer on cymbals. All this with only around 12 hours on the tubes. I suspect things will continue to change, and not for the worse. Thank you!! R.J." "