ALPHA 3-8 3" American Standard Series Speaker

The Eminence Alpha 3-8 is a versatile, compact, full-range driver perfectly suited for tight-fitting pro audio line array and column array applications. With a program power rating of 60 watts, this 3" driver utilizes an 8.3 oz ferrite magnet in conjunction with an internal neodymium bucking magnet for increased sensitivity and extends the response to 20kHz. The highly pressed cone sandwiches paper with a layer of water-resistant polypropylene for increased stiffness and lower distortion. Applications  Full Range Line Array | Pro Audio | Car Audio | Bass Guitar | Soundbars | Satellite System Box Type: Sealed | Vented Specifications Download Spec Sheet     Download Cab Design SPECIFICATION Nominal Basket Diameter 3", 76 mm Nominal Impedance* 8 Ω Power Rating* Program Power 60 W Watts 30 W Resonance 118 Hz Usable Frequency Range 150 Hz - 20 kHz Sensitivity* 88.6 dB Magnet Weight 8 oz. Gap Height 0.1", 2.5 mm Voice Coil Diameter 0.787", 20 mm THIELE & SMALL PARAMETERS Resonant Frequency (fs) 118 Hz DC Resistance (Re) 5.12 Ω Coil Inductance (Le) 0.11m H Mechanical Q (Qms) 7.94 Electromagnetic Q (Qes) 0.53 Total Q (Qts) 0.5 Compliance Equivalent Volume (Vas) 0.95 liters / 0.03 cu.ft. Peak Diaphragm Displacement Volume (Vd) 6.9 cc Mechanical Compliance of Suspension (Cms) 0.84 mm/N BL Product (BL) 3.93 T-M Diaphragm Mass Inc. Airload (MMs) 2 grams Efficiency Bandwidth Product (EBP) 220 Maximum Linear Excursion (Xmax) 2.4 mm Surface Area of Cone (Sd) 28.6 cm2 Maximum Mechanical Limit (Xlim) 4 mm MOUNTING INFORMATION Recommended Enclosure Volume Sealed Acceptable Vented Acceptable Driver Volume Displaced 0.005 cu.ft. / 0.13 liters Overall Diameter 3.98", 101.1 mm Baffle Hole Diameter 3.04", 77.2 mm Front Sealing Gasket Yes Rear Sealing Gasket Yes Mounting Holes Diameter 0.16", 4.1mm Mounting Holes B.C.D. 3.63", 92.1mm Depth 1.76", 44.6 mm Net Weight 0.9 lbs, 0.41 kg Shipping Weight 1.1 lbs, 0.5 kgs MATERIALS OF CONSTRUCTION Coil Construction Copper voice coil Coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Vented / Flux source cap     Basket Materials Pressed steel basket Cone Composition Paper/Poly sandwich cone Cone Edge Composition Poly cone edge Dust Cap Composition Poly dust cap Frequency Response