The fact that it was dead quiet at max volume at 48db and loud hum at 1/4 vol for 42db told me this was not something I was going to fix. I contacted Schiit and got a label to return the Mani. They are shipping a new unit. I tried moving it and grounding it multiple places. Nothing helped, most things made it louder! So no vinyl for a day or two. Thanks for the suggestions!