The new single ended 300B mono blocks with 300B driver are finished.
The Elrog ER300B casts a beautiful light onto the top metal plate with shadow 'beams' coming out at either side of the tube.
The complete set of amps with power supplies:
As is obvious, chassis layout and construction style are similar to the 10Y/300B amps.
The basic character of these 300B/300B amps is quite similar to that of the 10Y/300B. The 300B drivers give a warmer more full bodied sound.
Probably more a matter of taste which amp to prefer.
Light show in the dark:
I made a short video as well: