W1210040c Speaker 12inch Neodymium/Guangzhou Speakers/Audio Speakers PROMODELTYPEW1210040CMID-BASSGENERAL SPECIFICATIONSNominal Diameter300/12mm/inchRated impedance8ohmPower handing capacity600wattsSensitivity97dB/1w/1mFrequency RangeFs-2500HzVoice Coil Diameter100/4mm/inchVoice Coil MaterialAluminiumNumber of layer2Kind of layerOutside/InsideTHIELE-SMALL PARAMETERSResonance frequencyFs65HzDc resistanceRe5.6ohmMechanical factorQms8.77Electrical factorQes0.37Total factorQts0.36BL factorBL22.1T.MEffective Moving massMms78.5gEffective Cas air loadVas30.4litersEffective piston areaSd0.0541m^2MOUNTING INFORMATIONOverall Diameterφ315/φ12.4mm/inchBolt Circle Diameterφ296/φ11.65mm/inchBolt Hole Diameter8-φ6.5/8-φ0.26mm/inchMount Baffle Cut-out285/11.22mm/inchDepth152/5.98mm/inchSHIPPING INFORMATIONNet Weight (2 units)12.6kgShipping Weight (2 units)14.8kgPackage Size (2 units)708*357*198mm