Designing a power amplifier is always a demanding but usually revealing and rewarding task. Here some info on this topic from my side.
Comments on Audio Power Amplifier Design Handbook by Douglas Self
Douglas Selfs writing on power amplifiers is most concise, very systematic and without any doubt a must-read for anyone interested in this topic. In this paper I do present a couple of complementing and contrasting thoughts on the 5th edition of the book.