I am about to get a shotgun and a wireless microphone all of which to hook up to my DXA4-P. The wireless will go in the auxilary and the shotgun will go in the xlr. My question is, so stereo will be the proper setting on the switch in the rear of the DXA4-P? In edit I want one mic on the left and one on the right.

Yes, the "stereo" setting maintains the separation between the two inputs. The "mono" setting mixes the two inputs to both left and right of the BeachTek output. The AUX connector on that BeachTek is listed as going to the left channel. You would plug your shotgun into the right input.

Thanks a lot for the confirmation