A 15" bass guitar driver that delivers warm, rich tone and deep bass. A big brother to the popular 10" Legend BP102, this 350 watt driver is at home in small sealed enclosures, and also works well in Pro Audio and Home Hi-Fi applications. SPECIFICATIONNominal Basket Diameter15", 381 mmNominal Impedance*8 ΩPower Rating*Program Power700 WWatts350 WResonance32 HzUsable Frequency Range35 Hz - 2.1 kHzSensitivity*96.6 dBMagnet Weight56 oz.Gap Height0.3125", 7.9 mmVoice Coil Diameter2.5", 64 mmTHIELE & SMALL PARAMETERSResonant Frequency (fs)32 HzDC Resistance (Re)6.65 ΩCoil Inductance (Le)1.12m HMechanical Q (Qms)11.21Electromagnetic Q (Qes)0.5Total Q (Qts)0.48Compliance Equivalent Volume (Vas)397 liters / 14.02 cu.ft.Peak Diaphragm Displacement Volume (Vd)530.9 ccMechanical Compliance of Suspension (Cms)0.39 mm/NBL Product (BL)13.07 T-MDiaphragm Mass Inc. Airload (MMs)65 gramsEfficiency Bandwidth Product (EBP)63Maximum Linear Excursion (Xmax)6.2 mmSurface Area of Cone (Sd)856.3 cm2Maximum Mechanical Limit (Xlim)14.3 mmMOUNTING INFORMATIONRecommended Enclosure VolumeSealedAcceptableVentedAcceptableDriver Volume Displaced0.128 cu.ft. / 3.62 litersOverall Diameter15.15", 384.8 mmBaffle Hole Diameter13.9", 353.1 mmFront Sealing GasketYesRear Sealing GasketYesMounting Holes Diameter0.25", 6.4mmMounting Holes B.C.D.14.56", 369.8mmDepth6.61", 168 mmNet Weight12 lbs, 5.44 kgShipping Weight14 lbs, 6.35 kgsMATERIALS OF CONSTRUCTIONCoil ConstructionCopper voice coilCoil FormerPolyimide formerMagnet CompositionFerrite magnetCore DetailsVented and extended core Basket MaterialsPressed Steel basketCone CompositionPaper coneCone Edge CompositionCloth cone edgeDust Cap CompositionSolid composition felt dust cap