[] Giant Speaker at University of Wisconsin -Madison Engineering Expo 2011

[] This is a giant speaker constructed for the UW-Madison Engineering Expo in was built by a team of PhD students in electrical and mechanical engineering as a fun side project on a limited budget. The cone is made of polycarbonate and is 6 feet in diameter. The cabinet is 8ft x 8ft x 2ft or 128 cubic feet. Everything was custom made by the team, voice coil, magnet assembly, cone, surround, etc. Peak electrical draw is ~6kW. The video displays a chirp from 5 Hz to 500Hz or so.