Quote Originally Posted by E-Stat
It sounds like you just need some assistance understanding the mechanisms involved. Ever tried looking at a laser pointer through a CD? What do you see? Red light! I can't speak for green pens, but I can speak for the Marigo mat. It is flat black on one side and dark green on the other. What happens when you do the same experiment adding the mat? Wanna guess? It eliminates light scatter.

It is common knowledge that all transformers generate EMF fields around them. It is also common knowledge that toroidal transformers have replaced laminated transformers in most applications because they generate far less local EMF. Have you noticed that trend? Did you ever wonder why? Shakti Stones, like the VPI Magic Brick before them, absorb the EMF field. When placed atop a transformer, they reduce that field which can effect the sound quality of nearby circuitry. That was demonstrated to me over twenty years ago. Unfortunately, toroidal transformers are not available for large high voltage tube amplifiers. Which is why I use DIY bricks atop the power transformers on my amps.

rw
Apparently they're good for your car! I guessing your laptop or home computer's CPUs too.

"The SHAKTI Electromagnetic Stabilizer (aka "the Stone") has three internal trap circuits (Microwave, RF and Electric Field) to absorb the broadest spectrum of EMI. Placement on automotive CPUs has measurably increased engine horsepower. It also improves resolution for virtually all-major components in high definition audio/video systems. Music reproduction is clearer, with more liquidity, dynamics and focus. The improved inter-transient silence allows the listener to hear ambient cue information essential for accurate perception of stage depth, width and unwavering imaging. High quality video systems will benefit from SHAKTI devices near power supplies, projection guns and laser disc/DVD players. Reduced color noise and improved convergence alignment are some of the improvements that can occur. In automotive applications, where space allows, the unit should be securely taped and/or cable tied to the top of the CPU."

I've even seen them put on top of speakers, I guess to keep fields generated by the speaker from getting into the speaker. They also have stones for in-line use for your interconnects.

Where does the trapped EMI go? I don't see a connection where it can be drained/grounded. What are the Stone's capacity? They seem pretty small. Do you need to get a specific size for the application? Does the EMI spill-over when full? How does spill-over effect the sound? Can see why I'm skeptical? Pure anecdotal impressions only go so far as well.

I'm not trying to bust your chops. You're correct, you don't have to convince anyone and I appreciate your wanting to pass on a tweak you feel is effective. Tweaks are a "dime a dozen" (in some cases $10,000/dozen), some effective, some not. Some for the intent purpose of fleecing the gullible and uninformed. I just need to look more closely before plopping down $40 for a fuse. Anyone have opinions on "Digital-Ready" speakers? Remember them?