These are good tubes, but are they originals? I'm not shure. I was surprised that they are not warmer and more "tubey" even after quite a long burn-in. It's significantly better than the chinese tubes they replaced, and especially the sound stage, the room, are much improved, but I still i miss the real wow-factor that the originals should offer. If I should buy again, I will buy from someone that I KNOW ships the originals, even if it costs a bit more. I see that several other buyers also question the genuinity of these tubes. Same thing with some russioan tubes I bought from another shop. They also was less impressive than they should have been. Hard to know without the original to compare with.
Very nice tubes. Didn’t have a way to see if they’re paired but I’m satisfied with the sound.