OK, if I disconnect TT inputs to XPS-1, thumping is still there - so not the TT. If I lift the ground (from TT to XPS-1), no change to cyclical thumping. Actually, the thumping is about 1/2 speed if one or both TT inputs are removed.
There's no thumping if needle is down/playing, only when no "signal" is coming through.
I plugged XPS-1 into a different outlet, no change. So I think I have either a bad unit or its DC converter is bad. I won't be able to discuss with them until Monday.
I haven't found anyone describing this type of issue, only one other poster who had to swap-out DC converters 2x in one year for the XPS-1. Will update what I find.
There's no thumping if needle is down/playing, only when no "signal" is coming through.
I plugged XPS-1 into a different outlet, no change. So I think I have either a bad unit or its DC converter is bad. I won't be able to discuss with them until Monday.
I haven't found anyone describing this type of issue, only one other poster who had to swap-out DC converters 2x in one year for the XPS-1. Will update what I find.