This is another small project I did for Rob. It allows you to use a soundbox with a cube 152 power supply. It uses a small bulb on the -12V rail to simulate the minimum power draw of the MegaPixel monitor.
Rob has these in stock if anyone wants one.
Thanks Brian, it is a very interesting accessory, I would need just for my first series cube! Should it be connected internally to the cube?
yes, it occupies a nextbus slot internal to the cube.