Panamax is an excellent product with a lifetime warranty.The filtration is to prevent noise from appliances [fridge,havac,etc.] and RFI if thats a problem in your area.Check out Tripwire, also a lifetime warranty.You can try them out and return them if they don't make a positive difference.
I've used a Panamax for going on 17 yrs. now.When I first purchased it, I lived in a large city and didn't realize I needed noise filtration until I installed the Panamax and instantly had a dead quiet background.Good luck with your search.
I've used a Panamax for going on 17 yrs. now.When I first purchased it, I lived in a large city and didn't realize I needed noise filtration until I installed the Panamax and instantly had a dead quiet background.Good luck with your search.