I've got a Klein pro multi meter with very basic knowledge.

Personally I can't see how they would be much more than medical grade in that aspect. Of EMI and RFI blocking or grounding. Plus how can it possibly improve existing wiring without actually changing it out for a lower gauge or a private circuit of its own.

Recently I purchased a larger newer Monster power than the one I had 70% off their new Black Platinum line, that has 12 outlets. The coax. isolator and all my equipment on the same line with this new unit has cleared an existing coax. ground loop I have that my older unit didn't have enough outlets to cover.

Now wondering if an upgraded wall socket would help further.

Thanks again for your opinion.