Nominal Basket Diameter: 15"", 381mm, Nominal Impedance: 8 ohms, Watts: 600W, Music Program: 1200W, Resonance: 39Hz, Usable Frequency Range: 38Hz - 2, 7kHz, Sensitivity: 99dB, Gap Height: 0, 37"", 9, 53mm, Voice Coil Diameter: 3"", 76, 2mm, Resonant Frequency (fs): 39Hz, DC Resistance (Re): 5, 4, Coil Inductance (Le): 1, 27mH, Mechanical Q (Qms): 6, 08, Electromagnetic Q (Qes): 0, 41, Total Q (Qts): 0, 38, Compliance Equivalent Volume (Vas): 159 liters / 5, 6 cu, ft, Peak Diaphragm Displacement Volume (Vd): 471cc, Mechanical Compliance of Suspension (Cms): 0, 15mm/N, BL Product (BL): 18, 6 T-M, Diaphragm Mass Inc, Airload (MMs): 105 grams, Efficiency Bandwidth Product (EBP): 95, Maximum Linear Excursion (Xmax): 5, 5mm, Surface Area of Cone (Sd): 856, 3 cm2, Maximum Mechanical Limit (Xlim): 10, 4mm, Recommended Enclosure Volume, Sealed: N/a, Vented: 62-193 liters / 2, 2-6, 8 cu, ft, Driver Volume Displaced: 251, 7 cu, in, / 4, 12 liters, Overall Diameter: 15, 16"", 384, 9mm, Baffle Hole Diameter: 13, 87"", 352, 3mm, Front Sealing Gasket: Fitted as standard, Rear Sealing Gasket: Fitted as standard, Mounting Holes Diameter: 0, 25"", 6, 4mm, Mounting Holes B, C, D, : 14, 56"", 369, 9mm, Depth: 6, 38"", 162mm, Coil Construction: Copper voice coil, Coil Former: Polyimide former, Magnet Composition: Ferrite magnet, Core Details: Vented core, Basket Materials: Pressed steel basket, Cone Composition: Paper Cone, Cone Edge Composition: Cloth cone edge, Dust Cap Composition: Solid composition paper dust cap, SKU: TBALL9527