There is this interesting post I read on the web about Nelson Pass’s involvement, together with some from the DIY audio community about a newbie amplifier build camp. I first read about this from Make. For more details, the DIY audio article can be found here.
The project seems easy to build, and I just bought 4 pieces of used heatsink from a fellow DIY guy. So this is the perfect excuse to build a discrete class A amplifier! However, boards from DIYaudio seems to be sold out. So I’ll have to wire mine up on a perf board.
I was staring hard at the circuit and the board layout and there is an error on the original pcb boards where P1 is not wired to R3/R4 on the pcb. Although Nelson’s comments on the DIYaudio thread suggests that this is not an issue, I chose to build according to the schematic.
At the moment, I’ve got one channel mostly wired up. Just need to test it when the SMPS power supplies come in.