Use dual 18-inch subwoofer as a bar counter. In various bars, the space is more crowded, low-profile speaker on the roof will become the top of the stone, but the vibration will lead to cups and other utensils will fall underground, so the bar on the side with a stainless steel shelf to support the table up, high cost and unsightly. Bolton's independent suspension system uses a number of vibration reduction principles to reduce the vibration of the table, beautiful and economical.