Eminence ALPHA-12A 12" 300 Watts 8-Ohms Pro Audio Mid-Bass Speaker Guitar Woofer

Eminence ALPHA-12A 12 300W 8-Ohm Recommended for professional audio mid-bass applications in a small sealed or medium vented enclosure. Specification Nominal Basket Diameter 12", 305 mm Nominal Impedance 8 Ohm
Power Rating Program Power 300 W Watts 150 W Resonance 49 Hz Usable Frequency Range 51 Hz - 4.3 kHz Sensitivity 95.6 dB Magnet Weight 20 oz. Gap Height 0.25", 6.4 mm Voice Coil Diameter 1.5", 38 mm Thiele & Small Parameters Resonant Frequency (fs) 49 Hz DC Resistance (Re) 6.3 ? Coil Inductance (Le) 0.79m H Mechanical Q (Qms) 6.53 Electromagnetic Q (Qes) 0.88 Total Q (Qts) 0.77 Compliance Equivalent Volume (Vas) 121.5 liters / 4.29 cu.ft. Peak Diaphragm Displacement Volume (Vd) 125 cc Mechanical Compliance of Suspension (Cms) 0.32 mm/N BL Product (BL) 8.5 T-M Diaphragm Mass Inc. Airload (MMs) 33 grams Efficiency Bandwidth Product (EBP) 56 Maximum Linear Excursion (Xmax) 2.4 mm Surface Area of Cone (Sd) 519.5 cm2 Maximum Mechanical Limit (Xlim) 6.6 mm Mounting Information Recommended Enclosure Volume Sealed 17-22.7 liters / 0.6-0.8 cu.ft. Vented 56.6-113.3 liters / 2-4 cu.ft. Driver Volume Displaced 0.063 cu.ft. / 1.78 liters Overall Diameter 12.26", 311.4 mm Baffle Hole Diameter 11.06", 280.9 mm Front Sealing Gasket Yes Rear Sealing Gasket Yes Mounting Holes Diameter 0.25", 6.4mm Mounting Holes B.C.D. 11.71", 297.4mm Depth 4.73", 120.1 mm Net Weight 5.3 lbs, 2.4 kg Shipping Weight 7.4 lbs, 3.36 kgs Materials of Construction Coil Construction Copper voice coil Coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Vented and extended core

Basket Materials Pressed steel basket Cone Composition Paper cone Cone Edge Composition Cloth cone edge Dust Cap Composition Solid composition felt dust cap