I had two 400s's at one time. I tried plugging all video into one, audio into the other, and then all digital vs all analog. No matter what I tried, I just didn't get that much benefit.
Maybe Chu can chime in, but suspecting that maybe they didn't do anything, I hit up a EE friend of mine, and he was pretty insistent that for an inductor to do *anything* within the circuit, that it had to be wired in series. FWIW.
I have a 2Q now. At least in my system, the 400s's were not necessary. The 2Q does all I need. And, ... the 2Q is based on the scientific principal of common mode noise rejection. Not some mumbo jumbo about an "electronic flywheel" or however the RGPCs are marketed today.
But that was my system. Yours might be different.
