Talkbox Driver Polarity?

[GibsonGM]

Hi,
Scored an old driver from a PA horn, which was used in a talkbox in the 70s.  It's the size of a can o' beans and has 2 terminals marked "L1" and "L2", with the usual threaded projection.  Anyone have any clue how I could determine which is the + and - of the thing?   The guy who gave it to me says it worked great when he was in bands back then, but he forgets how it was wired.   Any info appreciated!
Thanks,
~Mike 

[dschwartz]

for a talkbox i think it doesn´t matter..just wire it

[petemoore]

  You're not running two of them, it shouldn't make 1 bit 'o difference.

[GibsonGM]

Cool, thanks for the input, guys.  Throwing on some Frampton....