Careful, JBL components of that era were notorious for having a polarity
that moved the cone outwards for a positive voltage on the black terminal.
You can certainly check the new polarity with a 1.5 volt flashlight cell,
but the total, correct polarity of the crossover, horn and woofer may be
mysterious. You'll probably know if you got it right when you play them
and listen to music around the Xover frequency.

In article ,
Mike Diack wrote:
Sent my woofs out for refoaming and in workshop renovations, lost the
bit of paper I wrote the polarity on.
2 wires : green, green+black
2 terminals : black, red
Anyone know who goes where?
cheers
Mike