[Ynze] has built an audio amplifier that ... directly to the pins of the amplifier chip. This can be some tricky soldering for beginners, but several PCB kits are available.

But what to use for the starting point? Enter an old Radio Shack P-Box stereo amplifier kit. After a few modernizations and tweaks, the result is an 8-transistor stereo amplifier that’s ...

Uniquely, Dynaco sold its amplifiers in two different ways: preassembled or as DIY kits (called Dynakits). The latter ...