EMINENCE Delta-12LF 12\\\'\\\' 500 W 8 Ohm Recommended for professional audio mid-bass or floor monitor applications in a sealed enclosure. Also suitable Mas a woofer in vented, bass guitar or PA enclosures. SPECIFICATION * Nominal Basket Diameter 12\\\", 304.8 mm * Nominal Impedance 8 ohms * Power Rating Watts 500 W / Music Program 1000 W * Resonance 51 Hz * Usable Frequency Range 44 Hz - 3 kHz * Sensitivity 94.6 * Magnet Weight 56 oz. * Gap Height 0.375\\\", 9.53 mm * Voice Coil Diameter 2.5\\\", 63.5 mm THIELE & Small Parameters * Resonant Frequency (fs) 51 Hz * DC Resistance (Re) 6.06 * Coil Inductance (Le) 1.45 mH * Mechanical Q (Qms) 7.28 * Electromagnetic Q (Qes) 0.51 * Total Q (Qts) 0.47 * Compliance Equivalent Volume 67.9 liters (Vas) 67.9 liters / 2.4 cu. ft. * Peak Diaphragm Displacement Volume 243 cc * Mechanical Compliance of Suspension 0.19 mm/N * BL Product (BL) 14.1 T-M * Diaphragm Mass inc. Airload (Mms) 51 grams * Efficiency Bandwidth Product (EBP) 100 * Maximum Linear Excursion (Xmax) 4.8 mm * Surface Area of Cone (Sd) 506.7 cm² * Maximum Mechanical Limit (Xlim) 13.5 mm MOUNTING Information * Recommended Enclosure Volume Sealed 19.8-28 liters/0.7-1.0 cu.ft. Vented 25.5-102 liters/0.9-3.6 cu.ft. * Overall Diameter 12.03\\\", 305.5 mm * Baffle Hole Diameter 10.95\\\", 278.1 mm * Front Sealing Gasket fitted as standard * Rear Sealing Gasket fitted as standard * Mounting Holes Diameter 0.25\\\", 6.4 mm * Mounting Holes B.C.D. 11.59\\\", 294.3 mm * Depth 5.35\\\", 136 mm MATERIALS of Construction * Copper voice coil * Polyimide former * Ferrite magnet * Vented and extended core * Pressed steel basket * Paper Cone * Cloth cone edge * Solid composition paper dust cap