Thanks so much for the speedy reply… okay, so I think I’ve got things resolved. I reconfigured my setup for the four cable method in Dual Mode (rather than running exclusively in the loop). This has resolved the hum/noise issue (still don’t know why it was there in the first place, but I’ll take it!)… I need to work the levels of the unit (while getting used to it), but will do it tomorrow, as I don’t need the cops at my door!   Thanks again for the prompt reply and I’ll report back tomorrow… so far so good! (What a great sounding unit!)….