Speaker Components :: Loudspeaker Drivers :: 4 Inch :: ALPHA 4-8
Eminence

Eminence Alpha 4-8 - 4" 55W 8 Ohm

SPL: 88dB 1W/1m Fs: 123 Hz Xmax: 2.6mm
Product Code: EMIALPHA4A Brand: Model: ALPHA 4-8
Eminence Alpha 4-8 - 4 inch 55W 8 Ohm
£39.93
£39.93 ex VAT
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2-3£39.33 ea.
4-7£38.73 ea.
8+£37.93 ea.
Usually available in <br>3-4 weeks
Usually available in
3-4 weeks
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Eminence Alpha 4-8 - 4" 55W 8 Ohm

Perfectly suited for line arrays, car doors and side panels, and other tight fitting applications, the Alpha 4 is a very versatile 110 watt driver that can be used full range, as a midbass, or as a midrange. They can be stacked by themselves in a column for vocal applications, or in conjunction with a tweeter and a sub for compact, high performance PA or MI applications.

Technical specifications


  • Nominal Diameter: 102 mm (4 in)
  • Overall Diameter: 116.1 mm (4.57 in)
  • Bolt Circle Diameter: 108 mm (4.25 in)
  • Mounting Holes Diameter: 3.8 mm (0.15 in)
  • Baffle Cutout Diameter: 95.8 mm (3.77 in)
  • Overall Depth: 58.7 mm (2.31 in)
  • Front Sealing Gasket: Yes
  • Rear Sealing Gasket: Yes
  • Impedance: 8 ohm
  • AES Power: 55 W
  • Program Power: 110 W
  • Sensitivity: 88 dB
  • Voice Coil Diameter: 25 mm (1 in)
  • Voice Coil Material: Copper voice coil
  • Voice Coil Former: Polyimide former
  • Magnetic Gap Depth: 3.7 mm (0.144 in)
  • Cone Material: Paper cone
  • Dust Cap Material: Solid composition paper dust cap
  • Surround Material: Cloth cone edge
  • Chassis Material: Pressed steel basket
  • Magnet Material: Ferrite magnet
  • Magnet Weight: 10 oz
  • Core Details: Non-Vented core
  • Sealed Enclosure Size: 1.87-8.5 L
  • Vented Enclosure Size: 2.27-4.25 L


Thiele and Small parameters:  Need some help? Read our quick guide to TS Params.


  • Resonance (Fs) - 123 Hz
  • DC Resistance (Re) - 6.73 Ohm
  • Voice Coil Inductance (Le) - 0.28 mH
  • Mechanical Q (Qms) - 6.83
  • Electrical Q (Qes) - 0.84
  • Total Q (Qts) - 0.75
  • Compliance Equivalent Volume (Vas) - 1.94 L
  • Peak Displacement Volume (Vd) - 15 cm3
  • Compliance (Cms) - 0.42 mm/N
  • Force Factor (BL) - 4.94 Tm
  • Moving Mass - System (Mms) - 4 g
  • Efficiency Bandwidth Product (EBP) - 146
  • Maximum Linear Excursion (Xmax) - 2.6 mm
  • Diaphragm Area (Sd) - 57.7 cm2
  • Maximum Mechanical Excursion (Xmech) - 4.5 mm

Shipping Information


  • Net Weight: 0.68 kg (1.5 lbs)
  • Shipping Weight: 1.5 kg (3.3 lbs)
Other Eminence products similar to Eminence Alpha 4-8 - 4" 55W 8 Ohm:
Eminence Alpha 4-4 - 4 inch 55W 4 Ohm
Eminence Alpha 4-4 - 4" 55W 4 Ohm
£39.93
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