I've got 2 Pioneer Elite receivers in my home. A VSX-70 and a 50. I'm trying to get an external bluetooth device with 'line in' RCA plugs connected so I can listen to the show on bluetooth headsets at the same time my wife is watching the movie on the surround speaker system so,,, both the speakers and the bluetooth headset need to be on at the same time. OK, so I'm hard of hearing! Both bluetooth and speakers independently volume controlled. Speakers via the remote and headsets with the headset volume control. For the life of me I just can't seem to figure it out. Just need to know where the RCA plugs go in the plethora of options available. Don't know if it's even possible to do it without purchasing another piece of equipment. I've searched everywhere on the net for an answer but can't seem to find one. Any help appreciated!.