benniegoodsill asked:
I have been to a couple concerts recently and have noticed a cone on the side of the stage. It is a clear cone shaped device with some kind of metal spiraled around it. The big end of the cone (A foot or less in diameter) faced the stage. Does anyone know what this is?
Jonathan
I have been to a couple concerts recently and have noticed a cone on the side of the stage. It is a clear cone shaped device with some kind of metal spiraled around it. The big end of the cone (A foot or less in diameter) faced the stage. Does anyone know what this is?
Jonathan
