I have always used a sub with my N802's. My power is the Krell 300cx and biwired with Transparent reference cables. My sub is a 12" Velodyne. I have always liked that little extra bottom end you get from a sub when and if you need it. (I know this will probably be anathema to some audiophiles, but, I have found that some recordings are bass shy and need a little extra punch.)
