Eminence KAPPA-15C 15″ 450 Watt Pro Audio Woofer – 4 ohms Midwest Speaker is an authorized Eminence Distributor and we feature nearly all of the Eminence product line. Please contact us if you want a different model. New in Box. Price is for (1) one speaker. Just change the quantity to order more. Really helpful for professional audio in a vented mid-bass or bass enclosure. Also suitable for bass guitar. SpecificationNominal Basket Diameter15″, 381 mm –> Nominal Basket Diameter15″, 381 mmNominal Impedance*4 ΩPower Rating**Watts450 WMusic Program900 WResonance31 HzUsable Frequency Range63 Hz – 2.8 kHzSensitivity***98.1 dBMagnet Weight80 oz.Gap Height0.375″, 9.5 mmVoice Coil Diameter3″, 76 mm Thiele & Small ParametersResonant Frequency (fs)31 HzDC Resistance (Re)3.68 ΩCoil Inductance (Le)0.88m HMechanical Q (Qms)10.14Electromagnetic Q (Qes)0.25Total Q (Qts)0.25Compliance An identical Volume (Vas)329.9 liters / 11.65 cu.ft.Peak Diaphragm Displacement Volume (Vd)206 ccMechanical Compliance of Suspension (Cms)0.35 mm/NBL Product (BL)14.7 T-MDiaphragm Mass Inc. Airload (MMs)77 gramsEfficiency Bandwidth Product (EBP)124Maximum Linear Excursion (Xmax)2.4 mmSurface Area of Cone (Sd)856.3 cm2Maximum Mechanical Limit (Xlim)11.6 mm Mounting InformationRecommended Enclosure VolumeSealed N/a Vented 40.00-79.00 liters / 1.40-2.80 cu.ft. Driver Volume Displaced0.138 cu.ft. / 3.92 litersOverall Diameter15.16″, 385.1 mmBaffle Hole Diameter13.87″, 352.3 mmFront Sealing GasketYesRear Sealing GasketYesMounting Holes Diameter0.25″, 6.4mmMounting Holes B.C.D.14.56″, 369.8mmDepth6.13″, 155.7 mmNet Weight17.6 lbs, 7.98 kgShipping Weight19.8 lbs, 8.98 kgs Materials of ConstructionCoil ConstructionCopper voice coilCoil FormerPolyimide formerMagnet CompositionFerrite magnetCore DetailsVented core Basket MaterialsPressed steel basket Cone CompositionPaper coneCone Edge CompositionCloth cone edgeDust Cap CompositionSolid composition paper dust cap For more specs seek advice from: http://www.eminence.com/pdf/Kappa_15C.pdf MADE IN THE USA. FAST FREE UPS GROUND SHIPPING TO THE LOWER 48 UNITED STATES ONLY. Does not include Alaska, Hawaii, and Puerto Rico. INTERNATIONAL SHIPPING TO CANADA WELCOME!!! Our shipping costs don’t include your country’s customs charges, taxes and other fees. Please do NOT ask us to send as a gift or to lower the declared value at the customs forms. *Returns only accepted if speaker has NOT been mounted or soldered. Shipping costs aren’t refundable and buyer will have to pay for return shipping.