@Grant-Fraser, that is my handwriting. It was in the woodshop during the reno. @Bradley-Maker had mentioned the idea had been to set it up in there, but it was not connected to anything or protected from dust so we moved it out. Talked to Bradley after marking the object DNH, and installing a sound system in the wood shop did not seem to be a priority.
No one seems to be using it; I have no objections to you making use of it.