Joey, welcome. No, the "crossover" control on subs, including the EP500, doesn't work the way that you're expecting. It isn't actually a full crossover that would roll off the sub above the frequency selected and the speakers below that frequency; it's simply a low pass filter on the sub which has no effect on the speakers, even in situations(not with the EP500)where the speakers are connected through the sub. So, what you propose isn't possible and you'll have to rely on your receiver for bass management. Use the regular coaxial cable to the sub, set all speakers "small" in the receiver, and most likely an 80Hz crossover. Since the receiver will be doing an actual crossover, set the "crossover" control on the ER500 to "bypass", since it isn't needed.
