ALPHA-8MRA 8" American Standard Series Speaker

Recommended for pro audio and bass guitar applications as a midrange. Sealed basket makes this woofer independent of enclosure design. Applications  Midrange | Pro Audio | Bass Guitar Box Type: Horn Loading 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 514 Hz Usable Frequency Range 400 Hz - 4.8 kHz Sensitivity* 100.9 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) 514 Hz DC Resistance (Re) 7.32 Ω Coil Inductance (Le) 0.34m H Mechanical Q (Qms) 4.48 Electromagnetic Q (Qes) 2.08 Total Q (Qts) 1.42 Compliance Equivalent Volume (Vas) 0.8 liters / 0.03 cu.ft. Peak Diaphragm Displacement Volume (Vd) 0 cc Mechanical Compliance of Suspension (Cms) 0.01 mm/N BL Product (BL) 8.9 T-M Diaphragm Mass Inc. Airload (MMs) 7 grams Efficiency Bandwidth Product (EBP) 247 Maximum Linear Excursion (Xmax) 1.6 mm Surface Area of Cone (Sd) 205.9 cm2 Maximum Mechanical Limit (Xlim) 3 mm MOUNTING INFORMATION Recommended Enclosure Volume Sealed N/a Vented - liters / - cu.ft. Driver Volume Displaced 0.02 cu.ft. / 0.58 liters Overall Diameter 8.22", 208.8 mm Baffle Hole Diameter 7.19", 182.6 mm Front Sealing Gasket Yes Rear Sealing Gasket Yes Mounting Holes Diameter 0.22", 5.6mm Mounting Holes B.C.D. 7.78", 197.6mm Depth 3.25", 82.6 mm Net Weight 4.4 lbs, 2 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 with closed back Cone Composition Paper cone Cone Edge Composition Paper cone edge Dust Cap Composition Solid composition paper dust cap Frequency Response