I'm looking for an existing design for a good yet simple class D audio amplifier using discrete semiconductors, no ICs. The purpose is educational, with a final product that actually could be used.
- not bad quality (but we don't need top quality, or to compete w audiophile gear)
- enough power to drive modest size speakers (it's hard to be quantitative about this)
- no exotic parts.
- within reach of serious hobbyists, EE students
- not too simple; not for beginners or kids to make.
- need not be commercially viable or survive outside an electronics hacker's home.
- small transistor count prefered, but no need shave every penny or cut corners.
- illustrates nicely the operation of class D amplifiers