Thanks for the responses to DSX and (Neo-X). I'll have to give this some thought. It means completely moving all of the equipment and furnishings in the room, placing the subs again, etc. Not sure if (to me) it's worth the effort, but I'll think about it.
AT&T U-Verse Northeast Ohio
Denon x4000, Carver m1.0t, Samsung LED TV, B&W 704 mains, two M&K subwoofers, Oppo 103, Roku 2, etc.
Headphone system: Sennheiser HD600, AKG K702, Hifiman HE-400i, Marantz HD-DAC1 (also used for music playback in the main system, Marantz CD5004, Denon DVD-3910