Okay, I could be wrong or a little off but here is what I understand it to be.
Here is the basic construction:
first is the front grille, then the first set of magnets, then the film, the second set of magnets, then the rear grille
the magnets are arranged so that the negative sides are facing each other (you know how if you try to put two magnets together with the same sides facing each other they push away from each other?) creating a field that pushes the film away from the magnets. the same thing is being done on the other side, which causes the film to be suspended naturally (thus thier efficiency) Also, they are naturally shielded. Despite being basically a big magnet, I can hold the transducer up to my monitor without worry of ruining it because it is naturally shielded (since the magnets face eaach other they cancel each other out)
When power is run through, the magnet's field is increased on one side and increased in the other direction on the opposite side, thus, one side pushes the film away while the other pulls it.
I hope that made some kind of sense
