Hello there,
I have the same one. Please do not unscrew anything. The tube upgrade was a good idea.
You can read a lot about this unit and other Leben products on Jeff Day’s page on Positive Feedback Online (Jeff’s Place).
Enjoy yourself.
Leben RS-30EQ Phono Preamp Info
Trying to find out more about this phono preamp that I inherited from my uncle. I've been using it with my DL103R and AnaMighty SUT and with a tube upgrade, I'm really happy with the way it sounds and it's super quiet.
I saw online some mention of the main circuit board being on springs? Does anyone know whether I have to unscrew anything? It doesn't seem to be springy but it was in a box packed up so maybe it was screwed down for travel? I have no manual unfortunately.