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Sold individually; Soundstorm subwoofer model cg8d with a diameter of 20.00 cm; black polypropylene cone; foam suspension; steel basket; vented backplate pole; effective power: 400 watts; maximum power: 800 watts; impedance: 4 ohms; double 4 ohm coil; qms: 4.259; qms: 4.259; qms: ES0.86 9; Qts: 0.719; Vas: 0.409 CuFt; Resonance frequency: 58 Hz; Sensitivity: 87 dB; Total Diver Diameter: 21.10 cm; Diagonal installation holes: 19.80 cm; Installation hole diameter: 18.30 cm; Installation depth: 9.40 cm; Magnet diameter: 11.40 cm; Package dimensions: 23.00 x 23.00 x 13.00 cm; cm; cm; cm; cm; cm; cm; Weight: 1.860 kg; Package weight: 2200 kg; Sold individually. This subwoofer works well in a housing that produces solid, tight bass. It is possible to buy a pre-made box or build one according to your installation requirements. The speakers are relatively easy to build and the smallest housing the subwoofer is designed for. A dual coil subwoofer provides more options for wiring configuration. When additional subwoofers are added, the wiring configurations can be easily adjusted to optimize the output power of the amplifiers. Power handling has also increased. Dual coil subwoofers are ideal for medium to high power applications. This subwoofer can be powered by a conventional 2-channel amplifier with 400 watts RMS per channel and power. Do not exceed the power recommended by the house to avoid irreparable damage to the subwoofer. › See more product details; Product description Sold individually; Soundstorm subwoofer model cg8d with a diameter of 20.00 cm; black polypropylene cone; foam suspension; steel basket; vented backplate pole; effective power: 400 watts; maximum power: 800 watts; impedance: 4 ohms; double 4 ohm coil; qms: 4.259; qms: 4.259; qms: ES0.86 9; Qts: 0.719; Vas: 0.409 CuFt; Resonant Frequency: 58 Hz; Sensitivity: 87 dB; Total Diver Diameter: 21.10 cm; Diagonal Installation Holes: 19.80 cm; Installation Hole Diameter: 18.30 cm; Installation Depth: 9.40 cm; Magnet Diameter: 11.40 cm; Package Dimensions: 23, 00 x 23.00 x 13.00 cm; Subwoofer weight: 1.860 kg; Package weight: 2200 kg; Sold individually. This subwoofer works well in a housing that produces solid, tight bass. It is possible to buy a pre-made box or build one according to your installation requirements. The speakers are relatively easy to build and the smallest housing the subwoofer is designed for. A dual coil subwoofer provides more options for wiring configuration. When additional subwoofers are added, the wiring configurations can be easily adjusted to optimize the output power of the amplifiers. Power handling has also increased. Dual coil subwoofers are ideal for medium to high power applications. This subwoofer can be powered by a conventional 2-channel amplifier with 400 watts RMS per channel and power. Do not exceed the power recommended by the house to avoid irreparable damage to the subwoofer.; Product description Sold individually; Soundstorm subwoofer model cg8d with a diameter of 20.00 cm; black polypropylene cone; foam suspension; steel basket; vented backplate pole; effective power: 400 watts; maximum power: 800 watts; impedance: 4 ohms; double 4 ohm coil; qms: 4.259; qms: 4.259; qms: ES0.86 9; Qts: 0.719; Vas: 0.409 CuFt; Resonant Frequency: 58 Hz; Sensitivity: 87 dB; Total Diver Diameter: 21.10 cm; Diagonal Installation Holes: 19.80 cm; Installation Hole Diameter: 18.30 cm; Installation Depth: 9.40 cm; Magnet Diameter: 11.40 cm; Package Dimensions: 23, 00 x 23.00 x 13.00 cm; Subwoofer weight: 1.860 kg; Package weight: 2200 kg; Sold individually. This subwoofer works well in a housing that produces solid, tight bass. It is possible to buy a pre-made box or build one according to your installation requirements. The speakers are relatively easy to build and the smallest housing the subwoofer is designed for. A dual coil subwoofer provides more options for wiring configuration. When additional subwoofers are added, the wiring configurations can be easily adjusted to optimize the output power of the amplifiers. Power handling has also increased. Dual coil subwoofers are ideal for medium to high power applications. This subwoofer can be powered by a conventional 2-channel amplifier with 400 watts RMS per channel and power. Do not exceed the power recommended by the house to avoid irreparable damage to the subwoofer.; Sold individually; Soundstorm subwoofer model cg8d with a diameter of 20.00 cm; black polypropylene cone; foam suspension; steel basket; vented backplate pole; effective power: 400 watts; maximum power: 800 watts; impedance: 4 ohms; double 4 ohm coil; qms: 4.259; qms: 4.259; qms: ES0.86 9; Qts: 0.719; Vas: 0.409 CuFt; Resonant Frequency: 58 Hz; Sensitivity: 87 dB; Total Diver Diameter: 21.10 cm; Diagonal Installation Holes: 19.80 cm; Installation Hole Diameter: 18.30 cm; Installation Depth: 9.40 cm; Magnet Diameter: 11.40 cm; Package Dimensions: 23, 00 x 23.00 x 13.00 cm; Subwoofer weight: 1.860 kg; Package weight: 2200 kg; Sold individually. This subwoofer works well in a housing that produces solid, tight bass. It is possible to buy a pre-made box or build one according to your installation requirements. The speakers are relatively easy to build and the smallest housing the subwoofer is designed for. A dual coil subwoofer provides more options for wiring configuration. When additional subwoofers are added, the wiring configurations can be easily adjusted to optimize the output power of the amplifiers. Power handling has also increased. Dual coil subwoofers are ideal for medium to high power applications. This subwoofer can be powered by a conventional 2-channel amplifier with 400 watts RMS per channel and power. Do not exceed the power recommended by the house to avoid irreparable damage to the subwoofer.