Eminence American Standard Alpha-12A 12" Pro Audio Speaker, 150 Watts at 8 Ohms

* Nominal Basket Diameter: 12-in , 305 mm. * Nominal Impedance: 8 Ohms. * Power Rating: * Watts: 150 W. * Music Program: 300 W. * Resonance: 49 Hz. * Usable Frequency Range: 51 Hz - 4.3 kHz. * Sensitivity: 95.6 dB. * Magnet Weight: 20 oz.. * Gap Height: 0.25-in , 6.4 mm. * Voice Coil Diameter: 1.5-in , 38 mm. * Thiele & Small Parameters. * Resonant Frequency (fs): 49 Hz. * DC Resistance (Re): 6.3 Ohms. * 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. ----------------------------------- 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-in , 311.4 mm. * Baffle Hole Diameter: 11.06-in , 280.9 mm. * Front Sealing Gasket: Yes. * Rear Sealing Gasket: Yes. * Mounting Holes Diameter: 0.25-in , 6.4mm. * Mounting Holes B.C.D.: 11.71-in , 297.4mm. * Depth: 4.73-in , 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 & 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.