Apparently these aren't really tube, or even hybrid, amps. Reports are two tubes are just buffers in the preamp section and two do something in the power supply. The buffer tubes could give a little warmth and tube like sound to the whole thing. My assumption is those big transformer boxes are empty. As usual with ChiFi there are numerous iterations with multiple brand name and cases containing the same boards. At the price it might be worth it and Parts Express is a reputable seller if you get a lemon.
