The results are in..... not good.

The PE mic combiner/splitter is crap. It did not get rid of the hum at all, in fact it made it a bit worse over using 1 XLR and 1 RCA output on the SMS.

Not only that, but it totally jacked my previously flat curve introducing some kind of mega noise into the signal.

This thing is going back to PE.

gonk, no worries on the recommendation, I had to give it a try. I was hopeful, but I guess you cannot use a $25 part on a $600 audiophile unit and expect positive results.