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Siemens CCa vs. Amperex 6922 D getter

I have a Audio Note P3 Silver with a Dodd battery pre amp. The Dodd calls for a 6922.

The Amperex WL GP PQ D getter in comparison to the CCa in my set up sounds dazed and confused. It is like a dirty window that needs cleaning when I insert the CCa.

I had the Amperex three weeks before the CCa came on the scene. When I first put the CCa in the music seemed to jump out of the speakers with such clairity that I was shocked that the Amperex somehow lost all that info.

So much for MR. Joe's report on the 6922. In my system they rock. I must say they work better with the TS 6SN7 RP than the Sylvania W metal. YMMV.

Anyone else have this experence?
glory

Showing 4 responses by tvad

tvad
9,467 posts
 
Which tubes "rock", which tubes "are like a dirty window", and which tubes "sound dazed and confused"?

No disprespect, but your syntax is confusing.

FWIW, in my system neither tube had the negative characteristics you described. Maybe you procured a bad pair.
tvad
9,467 posts
 
Thanks for explaining. That's what I thought you meant, but I wanted to be
certain.

In my system, the Amperex had a SLIGHTLY softer top end, and a SLIGHTLY
more diffuse midrange than the CCA, which in comparison had the precision
of surgical steel.

Now, everyone's interpretation of these differences varies, and what I
consider to be slight, you may consider to be extensive.

Also, to me what you describe seems possibly attributable to microphonic
tubes.

Or, it could simply be due to differing perceptions.
tvad
9,467 posts
 
08-03-08: Dsremer
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.
This mirrors my experience with these tubes.
tvad
9,467 posts
 
08-03-08: Rodman99999
Siemens CCa's (pre 1968) are NOT the least bit strident, bright or
glaring
They CAN be VERY close to being so. SOME
listeners might even perceive them as being bright.

I've heard it in a couple of systems that have been VERY carefully dialed-in.
The users decided to uninstall the CCa tubes.

Now, if CCa tubes are too high performance for many to to deal with, then
this should be a VERY strong caution signal for many potential buyers.
Ferraris are great cars, but they're not suited to most drivers.
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