1.strong performance , competitive price 2.dual 18' ' professional subwoofer 3.specialist in pro audio, pro subwoofer, subwoofer Q-218 is a dual 18' ' professional subwoofer, specifically designed to reproduce deep bass frequency with maximum efficiency, speed and impact. It is also ideal for reproducing the concentrated energy of contemporary music environments such as discos, club and outdoor shows where extreme level of bass is required. Model Q-218 Type Sub bass system Frequency Response 35Hz -130Hz ± 3dB Power handling 800W( RMS) 1600W( PEAK) Sensitivity 115dB( 1W@ 1M) MaxS.P.L 144dB( PEAK/ 1M) Components 2× 18" ( 460mm) woofers 75mm( 3in) coil Nominal impedance 4 ohm Finish black paint Speaker cables 1( + ) 1( -) Input connectors 2× NL4MP speakon Dimensions 1020× 530× 820mm( W× H× D) Package dimensions 1090× 600× 890mm/ 0.58cbm Enclosure plywood Net weight 68kg Gross weight 72kg