I want to build a discreet amplifier from npn transistors. Ive got some n2222s and also some tip3055s, and a dual 12v (+-) power supply. The 3055s are power transistors rated for 90w each, and i have 4. I want to power a 4 ohm speaker across the audio frequency range with 100W. I dont know where to start though. Anyone have any ideas?