I had their devices in my home for years. I used them for safety and nothing was ever destroyed by a power problem and line noise was never an issue.
So, before/after, no difference.
Listening evaluation for Environmental Potentials panel/breaker products?
Living in Kansas City in the spring has me revisiting protecting my system from lightning strikes and surges. I have done the usual stuff, but I keep wondering if the EP devices would protect AND improve my system noise floor. Not interested in a discussion of the EP technology, just interested to hear from someone who has listened to a before and after EP installation. Anyone out there who has and is willing to share?