Product Name: Hot Product 12 Inch PRO Audio Speaker Pulgadas Altavoz Parlante Pasivo De Audio Model NO.: HDW-1239 THD: <0.005% Monitor: None Application: Commercial, Home, Stage, Theater Speaker Material: metal Speaker System: Mono Operation Mode: Wire / Remote Control Activity: Passive Hi-Fi: Not Hi-Fi Noise: <95dB Sensitivity: 95.7 dB Voice Coil Diameter: 3 Inch Frequency Range: 56.3-4K Hz Type: Woofer Speaker Trademark: HD Transport Package: by Export Carton Specification: Net Weight: 6.95KG Origin: Guangzhou, China HS Code: 851829000 Product Description Hot Product 12 inch PRO Audio Speaker Pulgadas Altavoz Parlante Pasivo De Audio General SpecificationsNominal Diameter300/12mm/inchRated Impedance8ohmNominal Power handling350WattsProgram Power700WattsSensitivity(lw/lm)99dBFrequency Range56.3-4KHzMinimum Impedance(Zmin)5.6ohmVoice Coil Diameter75mm/inchVoice Coil MaterialCopperNumber of layersMagnet gap depth10mmSurround ShapeM-rollBasketCast AluminiumMagnet190Mounting InformationOverall Diameter313mmBolt Circle Diameter295mmBaffle Cutout Diameter282mmOverall Depth140mmNet Weight6.95kgShipping weight7.7kgShipping Box320*320*150mmThiele-Small ParametersResonance frequencyFs56.3HzDC resistanceRe5.6ohmMechanical factorQms8.58Electrical factorQes0.39Total factorQts0.37Mechanical complianceCms0.13mm/NMechanical resistanceRms2.5mech-ohmof suspension lossesEffective Moving MassMms60.7grHalf-space efficiencyEff2.32%BL FactorBL17.7T.mEquivalent Cas air loadVas52litersVoice-coil inductanceLelK0.7mHINTRODUCTIonHengda Audio is a professinal speakermanufacturerwith experience in the PA speaker field for 10years. We make different tranducers,compression drivers and tweeters. We not only provide goods but technology. OEM and ODM are both welcome.