Сведений пока нигде особых нет. Должны быть мощные однотакты
Судя по маленьким трансикам - это двухтакт.
Если прибавить явно тороидальные два транса - то налицо экономия со всеми вытекающими.
Кенотроны стоят слишком близко.
Я так понимаю это апгрейд таких
http://v2.stereotimes.com/post/lampizator-211-monoblock-amplifier/
push-pull mono block 
2 x 85
• Single Ended triode in mirror mode - TRUE BALANCED, mono block integrated amp (no need for a preamp)
• Dimensions: WHD : 450 x 140 (250 with tubes) x 600 mm
• Weight: net 33 kg per each mono before packing (39,5 kg packed)
• Gross shipping weight of a pair: 80 kg (190 lbs)
• Power: 85 WPC, pure class A
• Power consumption: 195 WPC on idle per channel,
• 95 W on pre-heating (per each block)
• Power Tubes: 211 triode
• Driver: White config 5687 - NOS
• Input tube Ecc808 - NOS
• Rectifier tube 5R4WGB
• Input impedance: 90 K x2
• Output impedance (speakers recommended) 8 Ohm
• Output transformer: OGONOWSKI / LampizatOr Push Pull
• High Voltage transformer: Ogonowski (using audio output transformer core )
• Biasing: manual (with exposed pot and meter)
• Volume: Stepped input ladder switch (24 SMD resistor pairs)
• Power transformers total capacity: 700 VA. 3 transformers in total
• Rectification: two separate rectifiers for High Voltage- one for 900 V (silicon) and one for 400 V (5c3s tube)
• Anode supply: 900 V DC
• Available front colors: black or silver (top always silver)
• Input topology: one XLR and no SE. SE input is not possible at all.
• Biasing range: -30 to -140 V DC (covers all 211 types)
• Mains transformers also covers now 110 V countries.