WOOFER MODEL15FX560SpecificationsNominal Basket Diameter 15" / 380mmImpedance 8 ohmsAES Power Rating 700 WattsProgram Power1,400 WattsFrequency Response40Hz - 4kHzSensitivity (1W/1m) 99dB SPLVoice Coil Diameter 3" / 77mmVoice Coil Length 23.5 mmAir Gap Height 14 mm X Damage (peak to peak) 21.8 mm BL Factor 21.5 N/AMounting Information Overall Diameter 16.5"/15.3 / 418.3mm/388mmBolt Circle Diameter14.72" / 374mmBaffle Cutout Diameter-Front Mount14.01" / 356mmNo. Of Mounting Holes8Overall Depth 7.27" / 184.6mmFlange & gasket Thickness0.45" / 11.5mmNet Weight16.7 lb. / 7.6 kg.Shipping Weight 19.8 lb. / 9.0 kg.MaterialsBasketCast AluminumConePaper Pulp (Weather Proof)SurroundTreated ClothFormer MaterialGlass FiberVoice CoilAluminumMagnet NeodymiumThiele-Small Parameters Resonant Frequency (fs) 38 HzImpedance (Re) 5.2 ohmsCoil Inductance (Le) .64 mHMechanical Q (Qms)6.76Electrical Factor (Qes).31Total Q (Qts) .3Comp. Equivelant Vol. (Vas) 5.65 ft3 / 160 LitersVoice Coil Overhang (Xmax) 9.42 mm Surface Area of Cone (Sd)m2 0.0859m2Reference Efficiency 2.76% Diaphragm Mass (Mms) 115 Grams Mechanical Compliance (Cms) .15 mm/N Mechanical Resistance (Rms) 4.2 Kg/sFrequency ResponseImpedance Curve Mounting Dimensions