Product Name: 15 Inch PRO Midrange Loud Speaker PA Speaker for Professional Audio System Model NO.: hdw-15700 THD: <0.005% Monitor: None Application: Commercial, Home Speaker Material: Ferrite Speaker System: Mono Operation Mode: Wire / Remote Control Activity: Passive Hi-Fi: Not Hi-Fi Noise: <95dB Voice Coil Diameter: 3 Inch (75mm) Basket: Aluminium Program Power: 800 W Sensitivity: 97.5dB Net Weight: 7.1kg Magnet: Ferrite 190 Trademark: OEM and ODM are both welcome. Transport Package: by Export Carton Specification: 10/12/15/18 inch are all available. Origin: China HS Code: 851829000 Product Description 15 inch pro midrange loud speaker PA speaker for professional audio systemGeneral SpecificationsNominal Diameter380/15mm/inchRated Impedance5.6ohmNominal Power handling400WattsProgram Power800WattsSensitivity(lw/lm)97.5dBFrequency Range43.4-4KHzMinimum Impedance(Zmin)5.6ohmVoice Coil Diameter75mm/inchVoice Coil MaterialCopperNumber of layers2Magnet gap depth8mmSurround ShapeM-rollBasketCast AluminiumMagnet190Mounting InformationOverall Diameter395mmBolt Circle Diameter378mmBaffle Cutout Diameter362mmOverall Depth155mmNet Weight7.1kgShipping weight7.8kgShipping Box400*400*180mmThiele-Small ParametersResonance frequencyFs43.4HzDC resistanceRe5.6ohmMechanical factorQms9.67Electrical factorQes0.49Total factorQts0.46Mechanical complianceCms0.16mm/NMechanical resistanceRms2.4mech-ohmof suspension lossesEffective Moving MassMms84.1grHalf-space efficiencyEff2.82%BL FactorBL16.3T.mEquivalent Cas air loadVas173.9litersVoice-coil inductanceLelK1mHINTRODUCTIonHengda 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.