Siemens CCa vs. Amperex 6922 D getter

I heard the Amperex's in the Dodd and thought they were great. I use them and Siemens in my Art Audio Alana pre.

Have you tried switching left and right? With the Dodd only using half the triode in each tube, you might notice a difference if one of the sides is a little off. Cost = 0.

It does sound like it could be weak tubes though. I have an amp that was starting to sound a little flat. I changed the output tubes, no luck, changed rectifiers, no luck. It uses 6922's and 12bh7's in the driver/gain stage, replaced them, bingo. All the dynamics/transients were back and it was day and night, not audiophile split hairs different.

I think you'll like the 7308's when you get them.

My understanding is that a CCa is actually a production 6922 which tests and sounds special. Thus they are just highly selected. That said I agree that it is a scapel compared to a rip saw.
The comments on the 6SN7s are verging on inane. Of course those tubes rock and if you really want a tighter sound try Jan CHS WGTs or Black NU GT if you want bass use Ken Rad VT 231 GTs.
One of the few notable reasons for buying such prescious tubes like Ws and RPs is that they are very extended and very dynamic. Nonetheless their very high prices are now hard to justify.
There are tons of great 6SN7s with less prestige attached to them going at auction for peanuts. If you are an SN7 fan, the summer time slow selling days are a boon to people starting collections.
P.S. forget about fimding an NOS CCa or even a high quality 6922 for less than a kings ransom.

The Siemens CCa tubes are worth every penny of the +- $250 that they cost. I use them in both my Sonic Frontiers Line 3 SE+ preamp and in my Wolcott P220M amp and there is simply nothing else that comes even close.
Do an A/B comparison to anything else out there and you will change to them despite the price - they are that good.

That will depend on your love for the truth. The Siemens CCa(earlier than 1968)will allow whatever is fed it to pass with less added or subtracted(more transparently) than anything else out there. That is it's intrinsic value to me. Everyone doesn't appreciate that virtue. Some want their tubes to sound. By that I mean add something that they find attractive, ie: "warmth", "tubiness", microphonics, etc. Like interconnects and cables, some use tubes as tone controls to please the ubiquitous aural palate. As sound tech(over 30yrs now), I get to listen to an awful lot of live(unplugged and amplified music), in a lot of different venues. Whenever I find something in my system that I don't find when listening live: I target that for correction. Then to: I've found a number of things lacking(comparing the system to live). The CCa's simply brought more dynamics, sound stage, focus, liquidity and extension to the table than anything else I tried(Tele's, Mullards, etc.)as far as the 6922 family in past ARC pre-amps, DACs and my present CDP. I've got six in my VK-D5 and have not rued the $$ spend on them for an instant. I figure what I'm willing to spend on my RP's, W's, CCa's and whatever else brings me closer to the sound of live music(and all it's nuances) in my home, will be directly proportionate to my love of that sound. In the past month I spent $700.00 on a power supply upgrade to my pre-amp(greatly enhancing the system's dynamic range), and $80.00 on a pair of Hi-Fi Tuning fuses for the AC in on my Cary Monoblocks(actually made vocals more "organic" for one thing). I knew what I'd gain from the the power supply, but the fuses were a trial. I'll be ordering more fuses for my tube voltage and VK-D5 AC circuits this week. That's just my way of pursuing my musical pleasure. As long as you're enjoying your way.....Kewl! That's what it's all about!

Hence goes the statement that old stock tubes are very system dependent... Siemens gray plate CCA's are very detailed and can be bright in some applications. Amprex PQ,S less detailed more warmth will be less fatiguing in again some applications. Now a tube that gets very little notice due to lack of availability... is the over built Valvo 60's red and yellow label E88cc. This tube in many applications will out perform both the above with a greatly expanded soundstage and mids to die for.
Dennis