I was delighted to discover that AudioPrism, originators of the infamous green pen (aka the AudioPrism CD Stoplight), is still in business. For newbies who do not know about the green pen, Collett and those who reviewed it shook skeptics to the core when they declared that painting the edge of CDs with the green pen lowered digital edge and improved data retrieval. The backlash was tremendous. Then Krell began bathing its CD tray in green light, some people found that green-tinted CD-Rs and then black discs sounded better, CD mats with green undersides made a demonstrable improvement in sound, and the skepticism was transferred to the next tweak on the horizon.
(The first time I tried the green pen, and heard the difference, I decided to save just a little money by purchasing a similar pen from an art supply store. Not only did it lack the little indent in its felt tip that keeps the pen from sliding all over the placeI made a mess of things - but it also left a sticky residue on the CD that messed up my player. So much for cost-cutting measures).
Byron Collett was eager to show the company's newest product, Ground Control. These little strips, terminated with a spade lug, are said to contain 150 feet of wire. Byron said to hang one from the negative terminal of each speaker, and listen to the difference. (I'll be trying them once I finish all my blogs).
Other Ground Controls are designed for electronics. The full range of AudioPrism products is available from a host of dealers plus the leading mail-order companies.