ALPHA-8A 8" American Standard Series Speaker

Recommended for professional audio mid-range applications in a sealed cabinet, or as a mid-bass in a vented satellite enclosure. Applications  Woofer | Midbass | Midrange | Pro Audio | Car Audio | Bass Guitar Box Type: Sealed | Vented SpecificationsDownload Spec Sheet    Download Cab Design SPECIFICATION Nominal Basket Diameter 8", 203 mm Nominal Impedance* 8 Ω Power Rating* Program Power 250 W Watts 125 W Resonance 73 Hz Usable Frequency Range 58 Hz - 5 kHz Sensitivity* 94 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) 73 Hz DC Resistance (Re) 5.3 Ω Coil Inductance (Le) 0.44m H Mechanical Q (Qms) 4.6 Electromagnetic Q (Qes) 0.68 Total Q (Qts) 0.59 Compliance Equivalent Volume (Vas) 17.7 liters / 0.63 cu.ft. Peak Diaphragm Displacement Volume (Vd) 67 cc Mechanical Compliance of Suspension (Cms) 0.28 mm/N BL Product (BL) 7.8 T-M Diaphragm Mass Inc. Airload (MMs) 17 grams Efficiency Bandwidth Product (EBP) 107 Maximum Linear Excursion (Xmax) 3.2 mm Surface Area of Cone (Sd) 210 cm2 Maximum Mechanical Limit (Xlim) 7.1 mm MOUNTING INFORMATION Recommended Enclosure Volume Sealed 5-7 liters / 0.18-0.25 cu.ft. Vented 16.7-25.5 liters / 0.59-0.9 cu.ft. Driver Volume Displaced 0.02 cu.ft. / 0.58 liters Overall Diameter 8.24", 209.3 mm Baffle Hole Diameter 7.13", 181.1 mm Front Sealing Gasket Yes Rear Sealing Gasket Yes Mounting Holes Diameter 0.22", 5.6mm Mounting Holes B.C.D. 7.75", 196.9mm Depth 3.25", 82.6 mm Net Weight 4.3 lbs, 1.95 kg Shipping Weight 5.1 lbs, 2.31 kgs MATERIALS OF CONSTRUCTION Coil Construction Copper voice coil Coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Vented core     Basket Materials Pressed steel basket Cone Composition Paper cone Cone Edge Composition Cloth cone edge Dust Cap Composition Solid composition paper dust cap Frequency Response