Which are identical if you are right in front of it, and also not calculable by human ear below certain frequencies.
Do we? My speakers are on the floor, or at least below waist hight, so that is at least a meter in height, away, so I would say I almost always am over 1.7M away from my speaker cone.
Where is the 3 times thing from?
In a live context, using a smoothhound, a helix (based system), and IEM, I have never had an issue. Obviously not saying anyone would but my timing comes from my fingers rather than my ears, and any latency that may exist is almost certainly so trivial in the grand scheme of sound playing live that it has never worried me. Obviously at home it would but then I am not using wireless and IEM often at home, and its nothing compared to Rockband on the PC!
So it comes down to, this looks like an interesting device but I find the sender a bit big.