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Eminence Delta 12A

EMINENCE Delta-12 12\'\' 400 W 8 Ohm Recommended for professional audio as a mid-bass or woofer (with high-pass filter) in vented enclosures. SPECIFICATION * Nominal Basket Diameter 12\", 304.8 mm * Nominal Impedance 8 ohms * Power Rating Watts 400 W / Music Program 800 W * Resonance 55 Hz * Usable Frequency Range 54 Hz - 5 kHz * Sensitivity 98.3 * 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) 55 Hz * DC Resistance (Re) 6.3 * Coil Inductance (Le) 0.74 mH * Mechanical Q (Qms) 5.27 * Electromagnetic Q (Qes) 0.46 * Total Q (Qts) 0.43 * Compliance Equivalent Volume 81.3 liters (Vas) 81.3 liters / 2.9 cu. ft. * Peak Diaphragm Displacement Volume 125 cc * Mechanical Compliance of Suspension 0.21 mm/N * BL Product (BL) 13.5 T-M * Diaphragm Mass inc. Airload (Mms) 39 grams * Efficiency Bandwidth Product (EBP) 120 * Maximum Linear Excursion (Xmax) 2.4 mm * Surface Area of Cone (Sd) 519.5 cm² * Maximum Mechanical Limit (Xlim) 9.9 mm MOUNTING Information * Recommended Enclosure Volume Sealed N/A Vented 25.5-85 liters/0.9-3 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 * Aluminum voice coil * Polyimide former * Ferrite magnet * Vented core * Pressed steel basket * Paper Cone * Cloth cone edge * Solid composition felt dust cap