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Eminence ALPHA 3-8

3-Inch 8-Ohm Full-Range Driver

Product Code 74287

Retail Price
$64.99
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$24.99
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Manufacturer
Eminence

A truly versatile compact full-range driver perfectly suited for tight fitting pro audio line array and column array applications. An 8.3 oz ferrite magnet used in conjunction with an internal neodymium bucking magnet increases the sensitivity and extends the response out to 20kHz. The highly pressed cone sandwiches paper with a layer of water-resistant polypropylene for increased stiffness and lower distortion.



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MPN: ALPHA 3-8

  • 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): 4.0 mm

    MOUNTING INFORMATION
  • Recommended Enclosure Volume
  • Sealed: 0.85-1.42 liters / 0.03-0.05 cu.ft.
  • Vented: 1.42-1.98 liters / 0.05-0.07 cu.ft.
  • Driver Volume Displaced: 0.005 cu.ft. / 0.13 liters
  • Major Diameter 3.98", 101.1 mm
  • Flat to Flat Diameter: 3.24", 82.3 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
  • Cone Composition: Paper / Poly sandwich cone
  • Cone Edge Composition: Poly cone edge
  • Dust Cap Composition: Poly dust cap


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