Replacement tubes for Sonic Frontiers Line 2 SE?

I've used RCA tubes in the rear most bank and was very happy. They were relatively inexpensive, and came very close to what I got from Telefunken. Also tried Amprex (not sure what flavor amprex, but I bought them new for $45) and didn't notice a difference between them and the stock Sovteks. I'd recommend sticking with the Siemens. Ya get what ya pay for.

My SF Line 1 is currently outfitted with the same NOS Sovteks Garfish references, plus a pair of NOS Amperex 7308 JAN white labels in the gain positions. After trying several others this combination is the best yet.

I used to own the exact preamp as you have now and I remember the best tubes I had on the gain positions are Siemens E188CC with A-frame (best treble extension), and the Siemens CCa A-frame(best bass and mids).
I tried variants of Siemens E188CC and CCa that does not have the A-rame structure and they don't quite sound as good as the A-frame versions. I also tried Telefunken 6922, Ampererex 7308 white label PQ, Amperex Jan 7308's white label,Mullard 6DJ8s and 6922 BVA logo, Valvo white label E88CCs and I repeat none comes even close to the two tubes I described above. Of course this are all just my opinion on how they sound on my system back then.

Hi All,

I have an SF Line 2 on the way.  I will be using it with a ModWright Oppo and primarily listen to digital media. I also recently purchased a Conrad-Johnson MF2275, so there's that....

I am looking for a 'dark liquid' sound.  Not 'warm' or 'bloomy', certainly no glare or blare. A hint 'woody' would be alright. Tightly radiant and/or illuminating would be good.

So what tubes can you all recommend?  

Thanks so much for for all of your shared experience.

Best,
b