re Musak
In a design lab at Marconi Chelmsford - so I was told:
Manglement decided that the department warranted a Tannoy speaker. A loud one.
The engineers disagreed. Complaints were ignored. Repeatedly.
Over the weeks the sound became more distorted, but quieter. Eventually whatever the fault was, the thing was barely audible and everyone was happy.
Some years later - redecoration time. A chippy (and probably a sparks) was sent round to remove the speaker. He nearly dropped it it was so heavy. Removing the back out of curiosity revealed a speaker cone peppered with holes and a box half full of lead shot.