Hi Dave, we changed cables, power supplies, the order, etc but the bottom line is the last three units lost all power, they don’t even turn on no matter what. It’s as yet unresolved, I just used the aux channels and older in-ears and one wedge to replace those three. The other three did fine. It will likely be a call to the distributor for warranty help tomorrow. Service went off without a hitch though! I’ll post when I know what happened to them. Thanks!