Those graphs are all in the Mhz range.nopiano said:
50 hz is 0,00005 Mhz!
20 khz is 0.02 Mhz!
IE at the extreme left hand side or off the scale of those graphs!
If you're worried about your power leads picking up radio interference which then somehow makes it past your power supply smoothing caps to cause instability or get converted to audible frequencies in your source or amplifier you could just simply clamp a magnet or two onto your FREE power cable.
13mm internal diameter split ferrite sleeves cost £5.86!
It would be fair comment to say that Russ Andrews is using Russ Abbot comedy marketing.