Thanks Alan.

The second option is what is set now. I have to turn BASS to maximum on NAD to have good amount of bass out of 500. When I shut speaker A off, I can hear clearly how much volume I can get from 500 and walk around to find a good placement.

For the first option, do I just insert speaker wires from M22s into the same input since I don't have long enough wires to connect M22 and 500.

NAD does have a pre-out 2 which could be used for subwoofer while pre-out 1 is back to Main in for M22s. would this be a better option since I can turn bass to minimum on NAD to have less overlapping low frequency sound. If I do so, I would need 2 RCA to 1 RCA adapter to connect RCA cables to 500, is that right?

Just want to figure out which option is the best to go.

Rock