Free circuit schematics - wiparat.com

A very useful audio amp in an 8-pin DIL package. The IC features a very low minimum working supply voltage of 3V, low quiescent current, good ripple rejection, no crossover distortion and low power dissipation. Maximum supply voltages is 16 Volts into 16 Ohms speaker, 12Volts into 8 Ohms and 9Volts into 4 Ohms. Link
Other [...]

This amplifier was designed to be independent in a small speaker box. It can carry feed, mini CD-ROM, iPod and CD players, computers and similar devices equipped with a line or headphone output. Of course, in most cases, you will have to get stereo boxes.
The circuit is deliberately designed with chips and not in a [...]