So now that I have had an ADD POWR Vivid Coax, and one of the HDMI units for a few weeks, I think I can comment on the effectiveness of these units.
The video on my Samsung 85" is remarkable! It has really not only brightened the image but sharpened it and the colors are excellent! It is not a hyped-up contrast or sharp edge picture but is very natural. And strangely even though the Vivid coaxial unit is on my outside antenna, it is still plugged into my Satellite receiver and the video on the satellite reception has improved, huh?
My wife who rarely comments on my Audio/Video passion even has noticed the improvement.
I just wish Bill could make a coaxial unit that can be directly compatible with my Dish Satellite and a HDMI unit for my OPPO 205.
Highly recommended!
ozzy