You don't need to have electrical training to hear something. You remind me of Ego man.
Ego man: "I'm an engineer and cables make NO DIFFERENCE whatsoever because my discman already sounds good, I don't even need to try cables because there are no FACTS that say so. Everyone who say cables make a difference are dead WRONG."
Truth boy: "But..."
Ego man: "No buts, listen to me, sell those stupid cables."
Truth boy: "But I have tried..."
Ego man: "DELUSIONS! You are insane and should be committed!"