Anyone HEARD the qol 'signal completion' device?

The manufacturer swears there is no gain stage in the unit. The additional perception of gain is really due to a cleaning up of the signal.

Now I personally agree with you, it sure enough sounds like additional gain to me. Others have said the amount of perceived gain varies by album though.

YMMV

Does this device work with speakers that have ribbon tweeter too?

I'm not aware that it would matter what type of speaker.
My understanding is that the device restores 'lost' phase information...restores it.
In that regard, the answer to the increased gain, may be answered.
More data, would equal more volume..more dynamic range.
So the 'illusion' of more gain, would be no illusion at all.
Dynamic range expansion, through recaptured, lost phase information.
Unless there's something I'm not getting, which is entirely possible.
Larry

All the negative posts based on theory and not having listened to them are a waste of your time and ours. We as well as you know "buyer beware" and that there have been countless gizmos that play with the signal before the qol and most of those if not all sucked after any long term listening. With this unit the longer I listen the more sure I am of its extreme value for me. Until you try it sour grapes seems small minded from my seat as I know what it can do for listening enjoyment.

So Marc, would you say this device is something you put in after everything else? I mean, would you say it would be a higher priority then something like room correction or room treatments?