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Eminence Alpha 4-8 4" Full-Range Pair 8 Ohm

Eminence SpeakerPart # 290-4012
Model: Alpha 4-8
The Eminence Alpha 4-8 is a versatile 4" driver that is ideal for compact, high performance PA, MI, or even car audio applications. These drivers are sold in pairs.

Key Features

  • Perfect driver for high output line array use
  • Flat response from 90 to 12,000 Hz
  • Cosmetic mounting flange for a clean look without flush mounting
  • Naturally damped paper cone minimizes resonances
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Overview

Eminence Alpha 4-8 4" Full-Range Pair 8 Ohm

Perfectly suited for line arrays, car doors and side panels, and other tight fitting applications, Eminence's Alpha 4-8 is a very versatile 110 watt maximum driver that can be used as a full range, midbass, or 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.

Also available in a 4 ohm version: Eminence Alpha 4-4 (290-4010)

Note: These drivers are sold in pairs.

Product Details

BrandEminence Speaker
ModelAlpha 4-8
Part Number290-4012
UPC876358003815
Unit of MeasurePairs
Weight3.3

Product Specifications

Nominal Diameter4"
Bolt Circle Diameter4.25
Power Handling (RMS)55 Watts
Power Handling (MAX)110 Watts
Impedance8Ω
Frequency Response105 to 12,000Hz
Sensitivity88dB 2.83V/1m
Voice Coil Diameter1"

Thiele-Small Parameters

Resonant Frequency (Fs)123Hz
DC Resistance (Re)6.73Ω
Voice Coil Inductance (Le)0.28mH
Mechanical Q (Qms)6.83
Electromagnetic Q (Qes)0.84
Total Q (Qts)0.75
Compliance Equivalent Volume (Vas)0.07ft³
Mechanical Compliance of Suspension (Cms)0.42mm/N
BL Product (BL)4.94T·m
Diaphragm Mass Inc. Airload (Mms)4g
Maximum Linear Excursion (Xmax)2.6mm
Surface Area of Cone (Sd)57.7cm²

Materials of Construction

Cone MaterialPaper
Surround MaterialCloth
Voice Coil Wire MaterialCopper
Voice Coil FormerKapton® / Polyimide
Basket / Frame MaterialSteel
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter4.57"
Baffle Cutout Diameter3.77"
Depth2.31"
# Mounting Holes4

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.08ft³
Sealed F3155Hz
Vented Volume0.26ft³
Vented F373Hz

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