Soundsing Audio Manufacturing Co.,Ltd is one of the leading China good price 21 inch speaker manufacturers and suppliers, providing with competitive price 21 inch loudspeaker wholesale, welcome to import high quality products from our factory. SD-21008A is a competitive price 21 inch loudspeaker with dual top quality dampers, inside and outside copper wire voice coil and thick washer, t-yoke. Bass is good also. If you want  high power big size subwoofer and limited budget ,this one is much suitable. It is our hot selling 21” speaker. Surely we have other smaller power 21” speakers also, such as 4” voice coil 21 inch with different design. Products specification Size:21” Rated Power: 1500W Peak Power:3000W Impedance:8 Ohm DC Impedance: 5.4 Ohm Sensitivity:98dB Frequency Response:30hz-1.6khz Voice Coil Diameter: 5 Inch Voice Coil Wire Material: Copper Bobbin Material: BAF Voice Coil Layers: inside and outside each 1 layer Dampers: dual Cone: Paper Magnet Size:153 OZ Mounting Detail: Outer diameter:543mm/21” Hole Cut Out diameter:500mm/19.68” Depth:260mm/10.23” Packing Information: 1pc one carton, brown inner and outer box Carton Size: 58*58*31CM Other Information Place of Original: Guangzhou, China Payment Terms: T/T, Western Union, Money Gram Port of Delivery: Huangpu, Guangzhou, China Production Lead Time:30days after receive 30% T/T