professional speaker - 15" woofer L15/6562B

4. Professionalspeaker for high quality wooferapplication 5. No press cone to increase the inner damping 6. speaker with tripple roll surround and exponential cone geometry 7. Details : General Specifications Nominal Diameter380/15mm/inchRated Impedance8ohmNominal Power handling1400WattsProgram Power2800WattsSensitivity(lw/lm)397dBFrequency Range436-4KHzMinimum Impedance(Zmin)6.7ohmVoice Coil Diameter75/3mm/inchVoice Coil MaterialCopperVoice Coil Winding Depth20mmNumber of layers2Magnet gap depth10mmCone ShapeCurvedSurround ShapeTriple-rollBasketCastAluminumFlux Density1.0TMagnet Material/MassCeramic/2.0kgThiele-Small parameters Resonance frequencyFs36.5HzDC resistanceRe5.6ohmMechanicalf actorQms2.1Electrical factorQes0.35Total factorQts0.30Mechanical complianceCms0.20mm/NMechanical resistance of suspension lossesRms10.6mech-ohmEffective Moving MassMms96.8grHalf-space efficiencyEff2.85%BL FactorBL18.8T.mEquivalent Cas air loadVas215litersEffective piston areaSd0.0887m2Max.linear excursionXmax7mmVoice-coil inductanceLelK1.36mHMounting Information Overall Diameter389mmBolt Circle Diameter369.5mmBolt Hole Diameter6.0mmBaffle Cutout Diameter349mmOverall Depth166mmNet Weight7.5kg We have the complete supplying chain of speakermaking.We make ourown raw speakers, empty cabinets and assemble speakser cabinets.