Ahoy, Bill,
I hope I didn't mess up your point, but would you test two of your guitars, one Alembic and (a) passive guitar()s, perhaps using single coil and humbucker signals, as the experimental and the control cohorts, respectively, to address your hypothesis? Also the first thing that I thought of when you said "wireless receiver" was the Air Force Base scene from "Spinal Tap". If you played out in places buffeted by a lot of common EM interference/commerce, do y'all think there would there be a difference between the efficiency of buffered/pre-amp'd signals remaining intact vs. passive signals getting to your wireless emitter intact given the different areas of the instrument's circuit and their incomplete shielding at all frequencies (e.g. exposed strings/tuning machines, microphonic pickup/potting issues, or potentially incomplete cable/cavity shielding)? Thanks! Cheers.