Srosenberg, I'll check the article out. I don't have a way to move the sub closer without losing the ability to cut frequencies from the mains. I'm using speaker level inputs. I do have a wireless subwoofer rec/transmitter that gives me the ability to place the sub wherever, but taking the load off the mains seems to have made the most difference in sound, or it seems that way.
Shadorne, I had B&W 801s3 in the room years ago. Don't know if a sub would have helped- never tried it. Again, my biggest gain has been midrange and treble clarity.
Thanks for your input/ guidance.
Gary