Prototype music gear and recording equipment gives a rare look into the mind of the designer. Not dissimilar to exotic concept cars, what may later become an iconic piece of gear almost always starts out as a relatively rough handmade idea with pioneering, ambitious vision behind it -- a bread-boarded concept that's built without much thought to cost of manufacturing or feasibility of production. Some are rather primitive curiosities, some almost come out of the gate fully-realized. Here, you can peruse Reverb's handpicked collection of rare prototype gear, pieces of history. After all, without "The Log", there is no Gibson Les Paul...