The products we're discussing were developed over years of sophisticated research, using all of the instruments that meter/measure electrical signal.Then where's the data?
The mfg rambles on about Fourier, so do an FFT on the line and the program w&wo the gadget. For under a C note, one can obtain a PC based scope that will do FFT.
He's set up award winning rooms at audio shows for years.Said rooms almost universally have the most gawd awful sonics.