@ladickinson - You say "low frequency AC harmonic". The signal in question is not related to the AC 50/60 Hz sine. I repeat - It is not an AC harmonic. There is no injection of an AC sine harmonic. Do you get it?
Rather, I suggest a low frequency signal, presumably a square wave, that is the result of signal processing circuit design, that is impressed upon the line. It is the square wave that is composed of a harmonic series of sine waves.
Not "absurd" imo.
I stand by my statement of power supply filtering in audio gear.
I didn't say that a power supply cannot filter low frequencies.
It appears you are locked into a fixed position of intellectual judgment and therefore dismiss any idea that disagrees with your intellect.
On an another note, it is up to the manufacturer /designer to reveal the complete recipe of its unique "sauce."
Rather, I suggest a low frequency signal, presumably a square wave, that is the result of signal processing circuit design, that is impressed upon the line. It is the square wave that is composed of a harmonic series of sine waves.
Not "absurd" imo.
I stand by my statement of power supply filtering in audio gear.
I didn't say that a power supply cannot filter low frequencies.
It appears you are locked into a fixed position of intellectual judgment and therefore dismiss any idea that disagrees with your intellect.
On an another note, it is up to the manufacturer /designer to reveal the complete recipe of its unique "sauce."