Specification System Configuration : Dedicated subwooferSB Subsystem & Loading : 1 x 18 inch woofer ventedConstruction : All construction with MDF wood except front with 18mm High quality 11-story wood plywoodConnector : 2x NL4MP Speakon 4pole Dimensions (inches / millimeters):Height : 21.26 / 540Width : 22.05/ 560Depth : 37.70 / 780- See more at: http://www.asia-proaudio.com/product/?product=P0fr58SRoq#sthash.ddmcvqFz.dpufอ่านเพิ่มเติม