You just inadvertently made djones51’s argument, and if you don't think you did, then you made the argument the video was trying to make.
andy2 OP1,181 posts07-07-2020 5:25pmJust a 20hz to 20khz sweep from your speakers. Use two different speaker cables in the same system and room. I can tell from that which gives the flattest response which will be the best cable.Things are not as simple as you think. No cable will be "flat". Any cable will have dip and bump at different frequencies. Not only that, there is phase shift too.