I do a similar thing when I go out on PA hire duties with a colleague of mine, he uses an Behringer X32 for FOH and I use my QU-SB for side of stage monitoring duties. To enable us to achieve this we use two Behringer MS8000 8 way mic splitters that we have rack mounted.
Multi-core (stage box) into the splitters, one feed goes to the X32 and the other to the QU-SB, but I think from memory when dealing with phantom power, only the FOH needs to be activated for the said channels, not both desks. We split in the traditional way, the FOH takes the direct line and applies phantom power and the monitor desk takes the other line that is via transformer.
The below YouTube clip from Behringer actually does the above in reverse, but either way works (Pre or Post transformer).
It leaves FOH to concentrate on FOH and the same for side of stage, also, you’re not sharing the gain stage. in that I mean, if for argument’s sake you’re performing FOH and monitors from the same desk, whether that be the QU-16, 24 or 32, you are limited with the amount of gain you have to use at stage side if the FOH desk’s channel gains (trims) are set very conservatively.
For a couple of reasons this is what prompted me to look into doing our PA jobs differently with better results, although with the X32 you can split the gain stages, but I never really got on with the X32 app, found it very clunky and slow to navigate from one mix to the other. The QU app is far more slicker and faster.
On the pictures below you can see the two MS8000 splitters and the QU-SB.
Hope this helps.
