Design is centered around the TPA3116 Class-D module powered by a 19vdc laptop supply - Twisting the small center vacuum tube controls volume - The larger KT66 tubes are for show, of course (a recycling move since all are failed) - Four LEDs are attached to the base of each, and a controller enables several varying flashing sequences (or else all on w/no flashing). The short copper pipe stubs surrounding the "chassis" add to the light emitting effect as well. Fun to watch and listen to - The TPA3116 is one impressive little amplifier... Ya gotta just love Class D.
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