Relay box speaker
This is an excellent loudspeaker. Lightweight, elegant, and with a charmingly thin sound. Run around with it. Makes people look & listen. I made it during the LLEAPP ... conference?? at DMU in Leicester, in March 2015.
Another example is this, a relay blue-tacked onto an empty reel to reel tape-box. Even smaller, but not a nice sculpture.
See this category: relays