Quote:
I connected my recievers subwoofer pre-out to the CleanBOX II with a cable that has an RCA jack on one end and an unbalanced 1/4" TS jack on the other. I connected the CleanBOX to the BFD with a balanced 1/4" TRS cable. I powered up the amp and it hummed very loudly. What did I do wrong?
The connections on the CleanBOX II are confusingly labeled in that one side is labeled input and the other side is labeled output, but a painted line seems to indicate that the inputs are connected, which seems not to be the case as I have tried connecting the cables all ways.
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This is a stereo unit, so there are two inputs and two outputs. The funny line between the two seems dumb for sure.
Anyway, since we presume this is a transformer device, you can remove the ground reference at its input and simply use the differential input.
Does the sub amp hum with just the BFD and cleanbox connected without the receiver connected?
Are you able to make your own cables?
brucek