Those guys are still in a kind of prototype state – see the steel spacer instead of a proper capsule mount – but I’m already using them for sessions and they work flawlessly.

Some quick infos for now:
Transformer: Haufe T8974
Tube: EC71

It’s a m49c inspired circuit (Oliver Archut’s alternative m49) and the layout and lasercut acrylic discs are done by me.

I have used a pair of those in quite some recording sessions, for vocals, drum overheads, guitars, bass, etc. very happy with them. I’m still working on a third one (2024).