Purchased 6 months ago, it was a lot (single correct THERMION TN412 + A)
It has 4 Celestion Vintage 30, and is made of marine plywood.
There is a plywood bulkhead inside by vertical baffle cut it into two for connection to stereo. It is a colossus of 50 kilos, indestructible. Very close to a Mesa cabinet correct. The sound is crisp, clean, powerful.