Kassai
Level Four, 22 watt Class A parallel single-ended no feedback mono power amplifiers, component quality and output transformers as NEIRO, valve compliment 4 x 300B, 2 x NOS 6SN7, 2 x NOS 5U4GB

Kassai Low Gain
Level Four, 22 watt Class A parallel single-ended no feedback mono power amplifiers, component quality and output transformers as NEIRO, valve compliment 4 x 300B, 2 x NOS 6J5 glass, 2 x NOS 5U4GB