Ok, I have to discuss this again. Saw another ad on Sterophile, so obviously people are still buying these things.
It's $1323, it's black, and it's a box. Give up? It's the "Blackbody ambient field conditioner" from Lessloss.com.
What does it do? It solves the "problem" of interference between light and your audio gear by absorbing light that hits it. It does this because it's black, and black things absorb light more than non-black things.
That being said, Lessloss says that you should buy multiples and position them all around your audio gear. This blocks more light. It also nets them more money.
Now what does Lessloss say about this "problem" of light influencing sound quality?
"According to our own research...a significant source of that coloration is ...due to any object in the vicinity of your gear’s circuitry".
They then offer a "technical" description of why this is and how their black box works.
They say: "Quite simply, different materials proximate to your circuitry will affect that circuitry." Even if light reflections are of high intensity and are directly hitting the wires, the difference will be undetectable with most electronics measuring equipment, let alone enough to cause an audible difference in music.
Why does the black box work? Here's their graph:
Here it shows how much light things put out or reflect. The takeaway from this? The $1323 black box works because it doesn't put out as much radiation as the sun, or an open oven turned on.
They say: "You can see how the blackbody got its name: by absorbing any EM wavelength, and by radiating none in our visible bandwidth, the device is as black as black can be; you might even say it is blacker than black". Blacker than black? If it was absorbing all energy, we wouldn't be able to see it. It would be a black void. But we can obviously see reflections on it. Note:
"It lowers the system’s noise floor, yet at the same time does nothing to color the sound. " No kidding. It doesn't do ANYTHING.
"Tips:... Several Blackbodies can be used in tandem to maximize coverage and effectiveness."
Well there you go.
Link
http://www.lessloss.com/blackbody-p-200.html