Those of you who like to challenge themselves with DIY projects in the realm of electric engineering applied to music, should take a look at MODKits DIY's authentic spring tube reverb design called The Wave. For the the young and unaware, spring reverbs are an electromechanical reverb device that produces a reverb effect by inducing sound vibrations at one end of a long wire shaped like a spring. They were among the first reverbs on the market, and you can find them in many now vintage guitar amps from the 50s and 60s.... Click on the title for more