@high-amp
I only use a single one. All of my gears are connected to a single line through a ZeroSurge 10 outlet plus a six outlet power cord. The Defender is in the six outlet extension. I tried to add an AC ipurifier but returned it as it didn’t add anything to the equation. I guess you can try multiple and remove one at a time to see if you lose any benefit. Nothing to lose as you can always return them.
I only use a single one. All of my gears are connected to a single line through a ZeroSurge 10 outlet plus a six outlet power cord. The Defender is in the six outlet extension. I tried to add an AC ipurifier but returned it as it didn’t add anything to the equation. I guess you can try multiple and remove one at a time to see if you lose any benefit. Nothing to lose as you can always return them.