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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
thewatcher101 OP
39 posts
 
So for power I found power supply with some type of toroidal transformer to be cost effective enough, the preamp has a lps, and the people who design my dac went really far and wrote a white paper a few pages and talked about the effort they put to clean the power. 

The issue pretty much goes away with a switch of tubes. I'll try to change sources and see but I'm pretty sure it's the tubes. 

I got some tube recommendation and ill give it a try. 



loungeaudio's avatar
loungeaudio
12 posts
 
All things aside, my favorite tube in the 'J8 family is the GE 6dj8 smoked glass. Rich midrange, yet not bloated. I will do tweaks around them to bring out the top end they lack. That's how good I think they are. 

Now don't ask me about the time I was at a surplus place and pulled out a drawer of about 20 Matsushita CV2493 and only bought 2 at the paltry sum of 1 dollar each!   

Good luck on your search.   
thewatcher101 OP
39 posts
 
I should also note that the dac is aggressive not in tonal qualities but just sheer amount of detail it is able to retrieve. It sounds like hd tv would, you see eveything but it in an artificial way. The tubes blend the sounds together to one coherent sound. If I bypass the tube stage and just dac to amp I don't have the issues.
loungeaudio's avatar
loungeaudio
12 posts
 
At this point give Tube World a call and ask them about this,

 " 6DJ8 Amperex Holland 1958-1959 "D" getter halo (the rarest and most sought after 6DJ8, very lifelike sound) (oldest and rarest 6DJ8 Holland in stock) (these are the best 6DJ8 to use in a linestage, more musical than CCa Telefunken) (6DJ8 Holland sound excellent in preamps by AR, CJ, Audible Illusions, Sonic Frontiers, VAC, CAT, etc.) (HEART tube CD player) Customer Comment: ---------------- "All my absolute favorite 6DJ8's are made in Holland. They have the rich midrange that I love."  
whart's avatar
whart
2,968 posts
 
Lounge- are you Morinix over on the Hoffman forum? If so, nice to see you here. 
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