What exactly does this thing do, if you don't mind me asking.
M
What they do is manage the magnetics and harmonics on the AC line. When used in conjunction with each other say CBfs at the breaker, wire bundle [ wires into panel], main breaker and inside outlet box and a Ref 2 and Ref 3 filter a transformation of the soundstage, imaging, weight and clarity is addictive.
Even a minimum of one at the wire bundle or breaker feeding your system will work wonders as I have experienced. Truly a no brainer, which is far and few between in our hobby. These work as claimed and highly recommended. ZERO SNAKEOIL.
charles