Let me approach this problem from the technical side. Good electrons in your cable, that you paid for, don't really move with AC current but rather vibrate in place (drift velocity). With Rap music these electrons can get bad vibes and stay that way forever. Excessive amount of bass can even move these electrons out of your cable and without any electric charge carrier cable is useless. That's why you should always change to cheaper cables before playing Rap. Better to be safe than sorry.