This question was posed on another group but wasn't really answered.
There is a PA installation with several zones . One zone is a bell
tower which has a separate speaker in it. The speaker is inaccessible.
The DC resistance of that line is 11 ohms. How can an installer
determine if this is a 70, or 25 volt speaker and which tap it may be
set at? Or perhaps it's just an 8 ohm speaker with 3 ohms of cable
resistance added? Is there n easy way to do this without an impedance
bridge? Thanks, Lenny