bergermeister:

My problem is that I can't easily re-connect my subwoofers to the LFE on the 950. If you saw my setup, you'd know why...

With the cross-mixing going on in STEREO 7, I would be very hesitant using it for any type of measurement, but that's just my pragmatic engineering side coming through

My RTA software can run on anything you plug into the computer sound input. I have a Bruel & Kjaer measurement microphone which is good +-1db to 40Khz. It has a preamp that puts out line level.