In reply to:

Does anyone recommend bypassing the ep-500 crossover in favor of the Denon's??

Yes! Using a subwoofer cord (RCA plug to RCA plug) connect your receivers Pre Out" subwoofer output, to the EP500s "Line In" input; set the EP500's crossover switch to "BYPASS," and set the crossover point in your receiver's speaker set up menu to 80 Hz.

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton