12 Inch Bass Speaker Professional Woofer PRO Audio

12 Inch Bass Speaker Professional Woofer PRO Audio General SpecificationsNominal Diameter300/12mm/inchRated Impedance8ohmNominal Power handling300WattsProgram Power600WattsSensitivity(lw/lm)96.5dBFrequency Range43-2.6KHzMinimum Impedance(Zmin)5.6ohmVoice Coil Diameter75mm/inchVoice Coil MaterialCopper Clad Aluminium Number of layers2 Magnet gap depth8mmSurround ShapeW-roll BasketCast Aluminium Magnet190 Ferrite Mounting InformationOverall Diameter313mmBolt Circle Diameter295mmBaffle Cutout Diameter282mmOverall Depth138mmNet Weight7.1kgShipping weight7.66kgShipping Box320*320*150mmThiele-Small ParametersResonance frequencyFs43.9HzDC resistanceRe5.6ohmMechanical factorQms6.56 Electrical factorQes0.29 Total factorQts0.27 Mechanical complianceCms0.25mm/NMechanical resistanceRms2.2mech-ohmof suspension lossesEffective Moving MassMms52.2grHalf-space efficiencyEff2.84%BL FactorBL16.8T.mEquivalent Cas air loadVas99.2litersVoice-coil inductanceLelK0.6mHINTRODUCTION Hengda Audio is a professinal speaker manufacturer with experience in the PA speaker field for 10years. We make  different tranducers, compression drivers. We not only provide goods but technology. OEM and ODM are both welcome.   /* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1