So... I built a practice amp, but it was not very practical as collection of tangled wires and a circuit board. I sketched up a cabinet that could be built with the scraps of 3/4" finished birch plywood that I used to build our piano bench. With the help of nearly all my power tools, I ended up with a very solid box. I need to laser out a metal panel at the top for the cable jack and some knobs and lights (knobs & lights are always good). Right now, the panel is made out of the side of a Busch Light box.
The cheesy speakers sound OK, and the audio amp IC is staying under 80 °C, so it should be OK. Once this is complete, it will be time to start building some cool effects citcuits (more knobs & lights!).
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