I tried to do something like this a few weeks ago... and here's what happened.
I have some sp binaural mics that terminate in a stereo miniplug. I ran that into my sp battery box. Then I have a cable that is female miniplug to 2 male XLR's which I plugged into my w-mod UA-5.
Turned the trim all the way down. Peak light was on the entire time. I quickly unhooked the UA-5, and went directly into the JB3.
So, if I was to run them into the RCA inputs (on the back, right?) I would still be benefiting from the W-Mod? Good to know!
Thanks!
+t's