Products like the 640X put their foot down to say "no more". Using tech exclusive to this Lithuanian hifi house, the basic concept of filtering ultra-high frequencies passively is of course shared with other firms. We've extensively covered Furutech's NanoCrystal² Formula in/around power cord plugs and AC receptacles. Another recent review highlighted Titan Audio's FFT 'force field tech'. Akiko, Shunyata and Synergistic have their own noise-combating systems and external ground/earthing boxes have grown into their own product category. Audio Group Denmark have their tesla coils, analog dither and anti-aerial cables for the Aavik, Ansuz and Børresen brands.

So many serious designers overlap in their acknowledgement of the noise issue. Concomitant antidotes simply express unique executions or MO. I doubt anyone knows which is most efficient. But I do believe that most would concur about more making merrier in this instance. Each layer of noise filtered or attenuated is a step forward. Critical listeners thus go on a strategic strip search to learn where and how best to strip away this insidious noise to improve their sound.

About just why this subject is so important, LessLoss have published this video.

What it doesn't show is the first connection between wall outlet and power distributor which most of us use because we don't have sufficient wall outlets for all our gear. Now that very first power cord becomes primary and of greatest importance.