Siemens CCa vs. Amperex PW 6922

At least you're at the top of the digital ladder. No doubt about analog(done right)though. I SO miss the days when direct-to-discs, original master/virgin vinyl, 1/2 speed mastered, MFSL, Sheffield, Crystal Clear, TELARC, JVC Soundstream, Nautilus, CBS Masterworks, ET AL were inexpensive and plentiful. Technology does march backwards at times doesn't it?

There are opinions, and then there are facts. Siemens made no CCa's with shiny plates and internal date codes in the early 60's. From the 50's through 1965 they had the dull grey plate(electrostatic shield) under the getter support. From 1966 to the 80's, they had the shiny silver/chrome shield and internal date code plate(and a major difference in sonics). Once one hears those two iterations compared, without any other variables, no argument remains. That's given a system that is capable of resolving the differences(easy), ears not attached to a head convinced of preconceived notions(not so easy) and a mind able to admit the truth(even harder). Then again- No doubt there are systems so muted in their high frequency reproduction that they can use a boost there. As always- Whatever works for you is fine with me. Happy listening!

TVAD,
I agree 100% with everything you said about Andy. I was wondering if you could recommend another reasonable, reliable tube source, with a more extensive inventory, for those tubes that Andy doesn't carry.