You didn't provide a web site link, and a Google search on "RF Inline Purifier" did not yield anything. My guess is that this device works about as well as those gizmos that promise to turn your house wiring into "the world's greatest antenna."
I don't want to sound like too much of a Mr. Smary-pants here, but the one thing that really sticks out to me is the "you will PERCEIVE darker blacks, increased resolution," blah blah. First of all it's not possible that it can increase the resolution of the signal and secondly, it doesn't even claim to do these things, it only says that you will PERCEIVE them. Possibly you will perceive this because you just paid $175 for it?
A forum community dedicated to home theater owners and enthusiasts. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories, classifieds, and more!