Axiom Home Page Forums General Discussion Stereo AV receiver vs. stereo Amp?

Maybe Ian or another member with a EP500 can confirm....you should be able to twist the cable ends together at the EP500 and not need an "output".
Run your left and your right cable to the sub, join the ends of these cables with the ends of the cable needed to reach your speakers by twisting the ends together, insert and tighten. Once for the left, once for the right.
Set your crossover using the subs crossover adjustment/knob.
Remove any extra equipment, try with just the Nad and a player of choice as per the recommendations given.