The Ceiling Janus: A Spinning Double Horn SpeakerBy Norman Chan Engineer Ian Schneller--the owner of Chicago-based boutique audio shop Specimen--
details the internal structures and functionality of his upside down spinning double horn speaker. Horn speakers have a distinct acoustic profile, and are suited for amplify the sounds of instruments like the violin and banjo. The Ceiling Janus built by Schneller takes on a life of its own in Specimen's workshop, with music spiraling out in a very visible way.
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