I could be wrong about this. I believe all these products are valuble. But again feel you must get away from all noise. Amplifing a signal of any kind is only worth doing if the signal is cleaned up. This holds true with F.M. VHF, UHF ,and others.My experience with powered terks for instance. Is that if the antenna out of the box cant pickup signals somewhat well F.M., or A.M. , amplifiing the signal gets worse not better.Same as the simple principle of trying to fix bad cable(low signal) by adding an amp.When you know you need a Positive signal before adding an amp.. Just my 2 cents..