4. PA speakers of other sizes could be available upon requests 5. woofer's details: General Specifications Nominal Diameter250/10mm/inchRated Impedance8ohmNominal Power handling1180WattsProgram Power2360WattsSensitivity(lw/lm)395dBFrequency Range461-3.5KHzMinimum Impedance(Zmin)6.1ohmVoice Coil Diameter50/2mm/inchVoice Coil MaterialCopperVoice Coil Winding Depth17mmNumber of layers2Magnet gap depth8mmCone ShapeCurvedSurround ShapeM-rollBasketCastAluminumFlux Density1.1TMagnet Material/MassCeramic/1.23kgThiele-Small parameters Resonance frequencyFs61HzDC resistanceRe5.3ohmMechanical factorQms11.8Electrical factorQes0.38Total factorQts0.37Mechanical complianceCms0.19mm/NMechanical resistance of suspension lossesRms1.15mech-ohmEffective Moving MassMms34.9grHalf-space efficiencyEff1.95%BL FactorBL13.8T.mEquivalent Cas air loadVas32.2litersEffective piston areaSd0.035m2Max.linear excursionXmax6mmVoice-coil inductanceLelK0.95mHMounting Information Overall Diameter261mmBolt Circle Diameter246mmBolt Hole Diameter5.5mmBaffle Cutout Diameter231mmOverall Depth113mmNet Weight3.6kg