Tannoy according to Schoenbohm
Niko Wilke found these speakers in Germany built by Schoenbohm, here is the short story of Niko:
I found these speakers with Monitor Gold 15" in "audiolive Schoenbohm" enclosures. This German company used to build studio equipment in the 70s. The enclosure is 140 x 60 x 40 cm. The back panel (and thus the ventilation surface) can be adjusted simply be turning the "Flügelmutter" (don't know the English term for this type of nut). Best regards! Niko.
The Tannoy Monitor Gold website
Hans Hilberink / PE1MMK - CAE - and Niko Wilke.
1970-1996-2004. update: 17-11-2004.