Subwoofer, 18 Inch Subwoofer, PRO Audio manufacturer / supplier in China, offering 18 Inch PRO Audio Sound Professional Loudspeaker Subwoofer for PA Speaker System, 10 Inch High Quality Neodymium Woofer Speaker PA PRO Audio, Professional 400 Watts 8 Ohm Woofer 10 Inch Neodymium Powered Woofer Bass Speaker and so on.