Yesterday, I received the black/red plug. Tried it first on my video dedicated line and watched some live TV. (football) I thought the image was very good, more 3 dimensional.
Today, I have it now plugged in to my main dedicated audio line in which I already have several other tweaks and a Niagara 7000 power conditioner.
First impression. I think I hear a little more definition but perhaps not. I plan on letting it run in for a week before removing it and then examine for change.
ozzy