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Product Name:  S- 21 subwoofer

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Model：S-21

Type：21’’ subwoofer loudspeaker system
Drivers：1 x 21'' LF
Frequency Response（±3dB)：30 Hz-1k Hz
Rated Power(AES/Peak)：2000W /4000W
Sensitivity（1m/1w)：105 dB  
Nominal Impedance：4 ohms
Dispersion（-6dB)：   0°
Connector：  2×Neutrik® Speakon NL4'S
Pin assignment :  NL4: +1/-1
Enclosure： 18mm Premium Finland Birch Plywood
Protective Grille :  Black perforated steel grille                            
Finish：Black Polyurea Coating
Dim.（HxWxD)：850x584x900mm[ 33,5 x23x 35,4 in]
N.W：76.4 Kg / 168 Ibs  
Packing: Carton