Missing the point
Clearly, these speakers are intended for sale to practical jokers. Just slip into a friend's house, change a lamp or covered light bulb when he's not looking, and off you go. You can start small, with barely audible music, and then move on to the big stuff, transmitting messages from God. For extra points, install multiple lightbulbs at various points throughout the house, so you can follow your intended victim from room to room, ensuring that his sanity is thoroughly eroded. Sure it's expensive, but can you really put a price on that kind of entertainment?