The Black Box is a Low Frequency Resonator Array that works in conjunction with the Subwoofers, Atmospheres and FEQ X4 to solve bass node issues.
Thanks @aniwolfe!
I use Herbie's Iso-Cups under my Impact Monitors and have added some weight on the top of the monitors to stabilize/couple them to the Iso-Cups. It did make a very nice improvement. I haven't tried the Aurios or Rollerblocks. Please let us know how they work-out. With these speakers you can hear every change you make to your system!