fpitas
Master Contributor
I think some of the confusion comes from the Zero Surge ad copy:Nothing surprising here. I have used these devices (also similar to Brickwall) and never have I seen any assertion that it will improve 'quality'. That is not its purpose. It is a surge suppressor and it works great. I have never had a surge hurt equipment protected by these while I have other electronics in the same house damaged from the surge that did not have these. I have 1 that is 15+ years old and still works great which makes its yearly cost low. They are not a one time use.
Non-sacrificial filter technology repeatedly suppresses worst case surges and removes EMI/RFI noise disturbances from the power line without wear or degradation to the components
From here: https://zerosurge-com.3dcartstores.com/2R15W_p_12.html