I love ogling these crazed homebrewed audio power amps that people build. This one is based on Jean Hiraga’s 20W Class-A Amplifier, but it’s been tricked out further to become the “Super Class A 30W Amplifier.” Check out those monster caps. Those are six 220000 uF capacitors (1.2 Farads!) and (in the center) that’s a 500VA potted toroid transformer for the power supply. Even with that significant heat sinking in the back, the sink’s still a scorcher, at over 100-degress above room temp.

Construction of a Class-A Amplifier