What if the volume is too high or low? Or the speakers are crappy?
If they bury that, the wires are goingto get moisture. The moisture will run down. And it wil short out the system. If it's wireless, it's going to run out of batteries eventually. "Yes, yes, we'll bury you with your music playing. Don't worry." Then a few days later the batteries stop working. You're down there for all eternity without music after that. Or until your ears deteriorate. Or brain. Which all of course wouldn't be working anyway. I suppose the volume could be cranked up in that case. The louder, the better.