a question posed on the A&H forum was "can I plug in a Y cable to the AR stage box to get a mono channel since they are fixed hard panned?
Not too off topic but may be helpful to others here with this solution as well:
"Gave the Y cable some thought to get 48V to a condenser to fake a mono channel to stereo... It should work but once you think about the two pull up resistors to get 48V to the mic, You would be putting them in parallel thus decreasing the impedance in half possibly applying too much current to the mic??? may or may not damage the mic but will def cause impedance issues with the 48V supply. What separates the 48V DC to the first gain stage is some small caps like .1 to do DC filtering.
FIX: take you standard XLR Y cable and add two .1 caps to the + and - pins 2 and 3 in series (inline) to one of the splits going to the stage box. This will prevent the two 48V DC from being connected. Since 48V will be applied to both ins- ch 17 and 18 it wouldnt matter which XLR end with the dc blocking caps gets plugged in to 17 or 18."
Once again thanks to all for great help.