Anyone HEARD the qol 'signal completion' device?

My attitude, less is more. Another device in the chain complicates matters.

Hifigeek,
Sorry to disagree...but...
Usually, less is more...but what if, big if here...that some thing, adds back, (restores) lost phase information, making for a more complete signal, one that looks more like the original?

My basic theology is YOUR theology, yet, having seen this, experienced what it 'appears' to do, I'm pulling for it, and do really believe in it's value.

Again, sorry to disagree...

Good listening,
Larry

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