Anyone HEARD the qol 'signal completion' device?


An ad in TAS... touting this box. I remain skeptical but would like to know what your impressions are if you have heard whatever it does!
128x128woodburger
When in active mode, it changes the amount of gain, making it nearly impossible for a true A-B.
Well, I am expecting much better results from the Qol unit than the last few posts have described.
I'll just have to wait and hear it in my own system this weekend.
Face,
Is it the 'gain' or the dynamic range that is changed?
Two very different items...

Larry