I'm surprised! Great tube!
I just wanted a cheap quad of EL34's to use while working on an old Rivera TBR-1SL. And although these are really inexpensive, they don't sound cheap at all. The bottom end is both plump and taught; the mids are clear, present, but not overly rich; high end is clear and clean. All four tubes biased within 1mA of each other! I'm happy enough with these new tubes that I'm leaving them in! I've only put ten hours in on them so I'll report back in a few months on how they hold up. As for their tone - I'd recommend trying some!