Use a 9 volt battery -- the kind you'd find in a garage-door opener. Touch the battery terminals (or use short lead wires, if necessary) to the spkr terminals. When the Plus battery terminal meets the Plus spkr terminal, the speaker cone will move FORWARD. In reverse polarity, it will move backward.
How one would determine polarity of Altec 808-8G ?
I have a pair of Altec 808-8G drivers. There is no polarity marking on the driver. Can anyone help me to determine the polarity of the drivers? Thanks