5.PA speaker 6.12" woofer of good price and good quality 7.Thisspeaker is of low distortion 8.other sizes are available upon requests 9.details: General Specifications Nominal Diameter300/12mm/inchRated Impedance8ohmNominal Power handling1300WattsProgram Power2600WattsSensitivity(lw/lm)395.5dBFrequency Range439-2.5kHzMinimum Impedance(Zmin)6.3ohmVoice Coil Diameter64/2.5mm/inchVoice Coil MaterialCopperVoice Coil Winding Depth16mmNumber of layers2(inside/outside)Magnet gap depth8mmSurround ShapeM-rollBasketCast AluminumFlux Density1.1TMagnet Material/MassCeramicThiele-Small parameters Resonance frequencyFs39HzDC resistanceRe5.3ohmMechanical factorQms9.7Electrical factorQes0.33Total factorQts0.32Mechanical complianceCms0.3mm/NMechanical resistance of suspension lossesRms1.43mech-ohmEffective Moving MassMms57grHalf-space efficiencyEff2.11%BL FactorBL14.8T.mEquivalent Cas air loadVas125.7litersEffective piston areaSd0.0552m2Max.linear excursionXmax6mmVoice-coil inductanceLelK1.1mH Mounting Information Overall Diameter318mmBolt Circle Diameter301mmBolt Hole Diameter6.5x9mmBaffle Cutout Diameter287mmOverall Depth135mmNet Weight5.2kg