Rock, you're basically correct on that point. The confusion caused in even some veteran audio enthusiasts by the mislabeled "crossover" control on some subs(unfortunately including Axiom subs)continues. Subs have no internal crossovers; the control is simply a low-pass filter which rolls off the sub response above the selected frequency but can have no effect on the mains, which continue to have to attempt to play the full range. This is the case regardless of whether the mains are connected through the sub.
