ALPHA 5-8: 5″ Midbass / Midrange  The Alpha 5 offers unmistakable performance with an emphasis on value. Rated at 250 watts program power, this 5 inch midbass features a water-resistant cone and dust cap, making it an excellent choice for line array or column array applications. Click Here to Download PDF Spec Sheet Click Here to Download PDF Cabinet Design Specification Nominal Basket Diameter 5″, 127 mm Nominal Impedance* 8 Ω Power Rating* Program Power 250 W Watts 125 W Resonance 87 Hz Usable Frequency Range 87 Hz – 3.5 kHz Sensitivity* 89.4 dB Magnet Weight 20 oz. Gap Height 0.23″, 5.84 mm Voice Coil Diameter 1.5″, 38 mm Thiele & Small Parameters Resonant Frequency (fs) 87 Hz DC Resistance (Re) 5 Ω Coil Inductance (Le) 0.29m H Mechanical Q (Qms) 11.81 Electromagnetic Q (Qes) 0.56 Total Q (Qts) 0.54 Compliance Equivalent Volume (Vas) 6.14 liters / 0.22 cu.ft. Peak Diaphragm Displacement Volume (Vd) 60.75 cc Mechanical Compliance of Suspension (Cms) 0.42 mm/N BL Product (BL) 6.22 T-M Diaphragm Mass Inc. Airload (MMs) 8 grams Efficiency Bandwidth Product (EBP) 155 Maximum Linear Excursion (Xmax) 5.9 mm Surface Area of Cone (Sd) 102.6 cm2 Maximum Mechanical Limit (Xlim) 6.4 mm Mounting Information Recommended Enclosure Volume Sealed 3.4-7.93 liters / 0.12-0.28 cu.ft. Vented 6.8-14.16 liters / 0.24-0.5 cu.ft. Driver Volume Displaced 0.018 cu.ft. / 0.51 liters Major Diameter 5.87″, 149.1 mm Flat to Flat Diameter 5.27″, 133.9 mm Baffle Hole Diameter 4.8″, 121.9 mm Front Sealing Gasket Yes Rear Sealing Gasket Yes Mounting Holes Diameter 0.18″, 5mm Mounting Holes B.C.D. 5.39″, 136.9mm Depth 2.91″, 73.9 mm Net Weight 3.1 lbs, 1.41 kg Shipping Weight 3.5 lbs, 1.59 kgs Materials of Construction Coil Construction Aluminum voice coil Coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Vented core Basket Materials Pressed steel basket Cone Composition Water resistant cone pulp Cone Edge Composition Cloth cone edge Dust Cap Composition Water resistant treated paper dust cap