I tried Sovteks and EH's in an ARC SP10II. Compared to the Sovteks (and NOS 6h23's) the EH's were dullish and muddy in both the line and phono stage.
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I can advise of both in a Quicksilver Pre-amp. I find the EH much smoother and more lush. As Newbee mentioned I too find them a bit muddy in the bass department.
Sovteks have better bass but can be a bit edgy with vocals and symbals with my pre-amp.
Sorry I do not mean to digress from your question on ARC.
Go to Upscale Audio's website and search for 6922/6DJ8 - you will see some reviews of the EH listed as type 2 I believe, there is a review from a user of the EH tube with respect to his LS-16.
Yes, that's an issue as well. As long as there not way off they should work just fine depending of course on the circuit. Honestly, there just isn't a really great 6922 on the market. If you can find inexpensive legit Amperex 7308's that's my favorite tube of all time and that was the top of the line. It went from top to bottom, 7308, 6922, 6DJ8.
Amperex "GOLDEN GLOBE"? I must be missing something. I know there are Amperex 6DJ8/ECC88, 6922/E88CC, and 7308/E188CC with "ORANGE" globe logo. I've never heard of "Golden Globe" Amperex. ;-P
And I have several hundred of this tube type from Amperex in my collection.
Skipped the Russian tubes all together, they just suck the life out of the recordings. I had just plugged in some 80's Rusian 6h23n into my LS-25 and they sounded flat and murky.
I was told by the previous owner of my Symphonic Line tube pre-amp that he had rolled several different kinds of tubes in and out of it, and that despite trying tubes significantly more expensive, the EH 6922s sounded the best in it.
So that's what I'm using, but I'd be interested to know of anyone's experiences with other tubes in this pre-amp.