[quote name='Jakester' timestamp='1460818789' post='3029070']
I think this concept would be great at weddings etc where noise can be an issue.
Use something like a Flyrig Bass, guitards use similar, PODs etc, drummer uses a (decent) e-kit, everything goes into the mixer and all the band use IEMs, then could either be straight to PA at more reasonable volumes, or as OP suggested, beamed to BT headphones.
Might be a bit weird for the singer though, to be basically singing to themselves in a quiet room!
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I have played in a trio for years that does this already, variax guitar, elec upright bass and electric drums. We can talk to each other at normal conversation volume levels behind the pa!