18inch W1815002 1500W Outdoor Subwoofer/High Power Subwoofer/Altavo0z ProfessionalMODELTYPEW1815002SUB-WOOFERGENERALSPECIFICATIONSNominalDiameter460/18mm/inchRatedimpedance8ohmPowerhandingcapacity1500wattsSensitivity95dB/1w/1mFrequencyRangeFs-1000HzVoiceCoilDiameter152/6mm/inchVoiceCoilMaterialCopperNumberoflayer2KindoflayerInside/OutsideTHIELE-SMALLPARAMETERSResonancefrequencyFs35HzDcresistanceRe5.7ohmMechanicalfactorQms7.75ElectricalfactorQes0.35TotalfactorQts0.34BLfactorBL33.2T.MEffectiveMovingmassMms304gEffectiveCasairloadVas141.7litersEffectivepistonareaSd0.1238m^2MOUNTINGINFORMATIONOverallDiameterφ464/φ18.27mm/inchBoltCircleDiameterφ440/φ17.32mm/inchBoltHoleDiameter8-7*8/8-0.28*0.31mm/inchMountBaffleCut-out438/17.24mm/inchDepth212/9.13mm/inchSHIPPINGINFORMATIONNetWeight(1units)31.4kgShippingWeight(1units)36.2kgPackageSize(1units)531*531*285mm