betavo AUDIO Speaker Component 18" Model : B18-C655 Carbon WATT SMOd 3000 MPEDANCE. Triple Magnet Specification Power RMS Maximal Power Nominal Diameter Rated Impedance Sensitivity (1w/1m) Frequency Range Voice Coil Diameter Magnet Diameter Resonance Frequency Total Factor Effective Moving Mass Equivalent Cas air load Triple Magnet Nett Weight Gross Weight Packing Size 3000 WATT 6000 WATT 460 MM 8 OHM 97dB 40-1000 HZ 152 MM 300 MM 42 HZ Fs Qts0.3 Mms 416 GR Vas 55 Liters 54 16 KG 65.24 KG 60*60+35 CM