This is an homebrew realisation of the "evolution 1" amplifier. It's a massive wooden chassis holding a polished copper plate. Interstage and output transformers can be seen standing just beside the tubes, while power supply is on the opposite side. The six selfs of the filter are gold plated. Net weight of the amplifier is about 40 Kgs; it's overall dimensions are 33cm x 66 cm x 15 cm.