![]() ![]() However, due to the unavailability of the original power transistors, I opted for a more robust output stage using Toshiba 2SA1943 and 2SC5200 complimentary transistor pairs. I used the original board layout shown in the magazine article (Figure 1) as well as the original driver transistors. I decided to base my build on the latest version that I could find called the "Super Class-A 30W"įigure 1: Jean Hiraga's Super Class-A 30W Amplifier Schematic and PCB ![]() Having read Jean Hiraga's article Construction of a 20W Class-A Amplifier and in copies of the old French magazine "L'Audiophile", I was interested to hear for myself how Le Monstre's bigger brother would sound. After building and listening to Jean Hiraga's "Le Monstre", a 8W Class-A Amplifier, I wanted to build "Le Monstre's" bigger brother "The 20W Class A" amplifier.
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