I switched the "bad" and good woofer and the good one wasn't working in the other speaker either
So I'm all worried it's the crossover now. So I pop open the crossover hatch and (eventually) realize the orange wire is lying loose underneath, and doesn't appear to have solder rosin on the tip of the wire. Was it ever soldered on? I'm not sure. I think if it was it was barely soldered properly. The other wires come right through the other side of the circuit board and the spot for this one there was no sign it had ever gone that far.
So anyway, I used the other crossover to figure out where to put the wire and soldered it on nicely.
Fired up some music and realized I had to re-set my left/right speaker levels. Did that and now everything sounds phenomenal! The speakers just sound awesome and work so well together.
I'm not upset about this at all though, Axiom speakers are awesome and really I deserve a beating for not realizing there was something wrong when I got them.
But everything is great now!