this is not exactly a tube audio question, but it does concern the old
alnico speakers typically used with tube audio

I recently found some old Jensen alnico speakers that were made in the late
50's how can I tell their impedance? (it is not marked)

I know that speaker impedance is defined as "nominal" impedance and that it
is the minimum? impedance at some point when graphed against frequency, but
what I need to know is whether I can take a simple ohmmeter and figure out
whether an old alnico speaker is 4, 8, or 16 ohms etc.

thanks,

cowboy