Hey there,
I got some random tubes that turned out to be special enough for a little description and pictures
6DJ8, M3624, triple mica, silver shield, o getter, toshiba from japan, electron tubes 7d (don't know what that means) and I don't know if there are equivalent from more sought after tubes
Not the most amazing tubes on earth but A+ separation and focus
great details and precision
soundstage seems average/normal, not small, not big
crisp, clear, snappy drum, and the cymbals are most important attribute to these tubes, sound like they are made of real gold, never heard cymbals like that before
the sustain last, the reverb is also present, not as much as some 75 reflektor I have tried, but the feel that the sound bounce on the walls is present
they are as rythmicaly musical and nuanced as you can get
the only problem is the sound is over polished, a little on the cold side with some harshness.
vocals are affected negatively, sounds like one layer is missing
Good tubes nevertheless. Great cheapies! I got 3 of them for about $15. Here are some pictures if you can help identify a more well known equivalent:
...seems like the hotter they get the better they sound. After an hour or 2 the bass increased and the higher region is less harsh.