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Preamp 6922 tube help

So my favorite tubes out of all the ones I've tried are early 1960 Siemens CCA, i find them to have an exteremely clean sound, fuller flat, tight bass, great imaging, just everything you would want. But because my system is on the neutral, the CCA has tipped it to the brighter side because of the "sparkle". I was wondering if anyone had another recommendation for tubes that perform like the Siemens, with its sense of realism but without the brightness in my system. 

Here are the tubes I've tried 


Telefunken E88CC ULM - clean tubes but the bass is too rounded out.
Mullard E188CC - too warm, way too warm
Voskhod Singlewire - great tubes but just didn't feel like didn't have any characteristics
Reflektor Single Wire - seems like the mids were a bit warm, but very nice tubes, but i would always rotate them out after a period because they didn't feel too accurate, but very sweet. 
Amperex - Forgot which ones but the highs and lows were rolled off. 
Electro Harmonix 6922 - has a basic tube sound to them on the warm side of things. 






thewatcher101
yogiboy's avatar
yogiboy
5,465 posts
 
GE 6DJ8 from 1960's is a real nice tube!
mofimadness's avatar
mofimadness
4,935 posts
 
These might surprise the hell out you.  They did me.  I've owned and heard so many different 6dj8/6922/7308 variants that I can't remember them all.  These are really spectacular and don't cost all that  much.

https://www.upscaleaudio.com/collections/preamp-tubes/products/matsushita-national-pcc88-7dj8?varian...

noromance's avatar
noromance
9,404 posts
 
Keep the CCa. Maybe try changing another component in your rig... interconnect, sit CD player on layer of cork tile...etc.
Post removed 
thewatcher101 OP
39 posts
 
I was thinking about changing the capacitor on the speakers, so far other things to make the system warmer, I didn't like. 

I was thinking of Jupiter Vintage Tone, I am running Jenzen Superior 10uf right now, and they are pretty flat sounding capacitors, which the tube tilts to bright. 

I removed the preamp from the linear power supply to make it sound warmer, I didn't like the sound of that. I might take the preamp off the isolation blocks. 


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