As I told Dave, I couldn't measure any difference with my Entech Noise Sniffer when the BETABUSS was plugged in to a circuit across or below the breaker my system is on.
Based rollo's post, I plugged it in the same circuit my system is on.
I adjusted the Entech Noise Sniffer's Sensitivity until the display showed 100.
Turning the BETABUSS on, dropped the reading on the display to under 5.
Thanks for checking in, Dan.
My results, only different. On my opposite branch, I heard the 'fridge get noticeably quieter. I was so curious I broke out my venerable (read as old, but still functioning... Like me) Audio ToolBox as well as my B&K 2250 sound level meter. Both of them caught the running noise level at about -2dB relative to SPL without the Depot in place. Doesn't sound like much, but that amounts to a 37% reduction in SPL.
Gayle liked the Depot so much on the same receptacle with the TV, Direct TV receiver and DVD player that I'm having to build one for there (her).
Some systems or old ears will not hear the electrical noise reduction as a stark change. Putting it on the same branch in a different location makes a distinct difference. Even Dan's system that is treated with an Uber showed a sizable difference. It started out VERY quiet with the Uber and got quieter with the Depot. I'll take that