1.1x15" LF speakers subwoofer 2.Usage: stage 3. AES standards power handling: ... )60Hz~400Hz MQC-25B High power dual 15 inch subwoofer 1.MQC-25B is a kind of 2x15" speakers ... subwoofer with high efficiency. 2.We adopt a way ... performance, stadium, club and other public places.dual 15-inch subwoofer 15 inch subwoofers with box pro audio , professioanl loudspeaker ...