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"Create a unique 3D design that can adorn two opposing, not adjacent, panels of the enclosure (To preserve the original audio performance of the speaker, you must only design a single or two opposing panels.)" This sounded a bit too restricting, so I decided to do quite the opposite. The Rotary Bose is an add-on made to attach to the Bose-Build Speaker made especially to alter the original audio performance of the speaker. The speaker is pointed down into a Rotor, the big red thing in the middle. This rotor is attached to a simple adafruit DC motor. The motor is connected to some batteries through a potentiometer at the back to controll speed. when the rotor is rotating when the speaker is playing music, it will give a nice and old-school tremelo effect. A simple 3D printed micro-sized Leslie speaker! You can take a look at this youtube clip as example: youtu.be/QxdrGlA_VkI?t=10m20s