Just throwing this one out there.
A customer just bought a new building with office and shop pa speakers, but no hardware except the speakers and wires running to them(hopefully).
How can i easily test which wires run to which speakers - perhaps put out some sound- without damaging the speakers?
I have common network IT tools handy, but no butt-set.
A search on google "testing speakers with battery" returned a few results like:
Test a speaker with a 9 volt battery - Sound Speaker Repair
Testing a speaker with a 9 volt battery - YouTube
hope this helps