AC regenerators (essentially power amplifiers) do many wonderful things, exactly as claimed, in the area of delivering clean and pure low-impedance, high power AC - up to a certain point, constrained by its rated output. Not to nit-pick, but I’d like to better understand its less-well-understood shortcomings.
As I had suspected, while reduction of both common-mode and differential-mode noise is “spectacular” up to the AC regenerator’s upper bandwidth, above this, which is to say, unfortunately, the VAST majority of AC and RF noise, pass RIGHT through to the AC regenerator’s outputs. Additionally, noise on the Ground line is not attenuated at all by the AC regenerator, which would be especially problematic for source components.
Hence, a BIT (balanced isolation transformer) connected between the AC regenerator’s output and the source component will be complimentary, as it will be remove AC noise (both common-mode and differential) all the way up to the RF spectrum, as well as noise on the Ground conductor/plug. The weakness of the BIT will be in its high AC resistance, due to phase lag for AC transients, hence unsuitable for supplying AC to power amps.
Here’s an excellent White Paper published by Garth Powell (of AudioQuest) from where I extracted my observations from: