It's pretty bloody obvious what's wrong. You don't even have to be technical to figure it out. The sub's traffic light is busted so it's staying red. Therefore the audible clicker is just staying put waiting for the light to turn green so it can click. All you gotta do is ask Axiom for a new sub traffic light.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated