[ACHiPo]

Originally Posted by tima

Fwiw, those are not ferrite beads slithering around in the Python. It a proprietary Shunyata compound that is, or is similar to their proprietary ZrCa2000 and tuned to absorb non-musical energy in the megahertz and into the gigahertz ranges. Irc, Shunyata believes it is clearly sonically superior to ferrite beads.

With regard to measurement testing ...

There is an interesting post from Grant Samuelson about using the IDEAL SureTest analyzer to measure Shunyata products on a different forum (Whiskey Bravo Foxtrot) - a direct reference to which here is VERBOTEN. There is also a lengthy thread named "Measuring power line noise with the TriField EM100, and the impressive effect of Shyunyata products" on the same forum wherein the Entech device is also discussed. I believe you know where this can be found if you've not seen it already.

Tim,
Thanks for the correction—I knew the beads are not ferrite, but had just clamped ferrite beads on Romex and guess I typed too fast without thinking. By the way the ferrite beads on Romex did not have any measurable effect on line noise.

In addition to the Entech line noise analyzer I also use the Ideal analyzer to measure instantaneous current capability.

I’m familiar with the other forum thread to which you refer. I bought the Entech rather than the TriField based on a statement by Caelin that the TriField is not sensitive to a noise band that is detrimental to audio while the Entech is.