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.
I haven't touched my system for over a week now but did do some extended listening last night. The E-Cards and Total Contact are the real deal. Using just a modest (but well engineered) Yamaha receiver I'm getting really, really good sound. But, of course, I can't leave well enough alone so I've been looking at the Audio Magic line of products and have exchanged brief emails with the owner Jerry Ramsey. Here is a quote from his website which is VERY interesting:
"The theory about Pulsed Electron Alignment is based on how electrons spin. They spin either up or down in a phenomenon called spintronics. When there are billions of electrons all spinning their own way, it can create chaos in and around components. By aligning the electrons, you create a more efficient space and eliminate noise. This means that your listening experience is more realistic, with a more musical presentation featuring tighter, more dynamic bass, highs that are delicate and more natural and beautiful midranges."