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Eminence Beta-8A 8" Midrange/PA Driver

Eminence Speaker
Part #290-404

Eminence Beta-8A 8" Midrange/PA Driver

Eminence Speaker
Part #290-404  
Model: Beta-8A
Eminence's durable and efficient Beta-8A 8" speaker features extremely smooth frequency response and high power handling. Its performance rivals that of speakers costing much more!
Key Features
  • Kapton coil former
  • Polyamide-imide coated copper voice coil
  • Ferrite magnet
  • Pressed steel basket
  • Paper cone
  • Cloth accordian surround
  • Solid composition paper dust cap
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MSRP: $119.99
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Overview

Eminence Beta-8A 8" Midrange/PA Driver

The Eminence Beta-8A 8" Midrange/PA Driver's performance is optimized for midrange use between 400 Hz and 4 kHz in multiway systems. The Beta-8A is also suitable for vocal PA, keyboards, stage monitors, and bass guitar.

Product Details

BrandEminence Speaker
ModelBeta-8A
Part Number290-404
UPC876358000067
Unit of MeasureEach
Weight7

Product Specifications

Nominal Diameter8"
Power Handling (RMS)225 Watts
Power Handling (MAX)450 Watts
Impedance8Ω
Frequency Response78 to 4,500Hz
Sensitivity95.1dB 2.83V/1m
Voice Coil Diameter2"

Thiele-Small Parameters

Resonant Frequency (Fs)65Hz
DC Resistance (Re)5.99Ω
Voice Coil Inductance (Le)0.49mH
Mechanical Q (Qms)4.95
Electromagnetic Q (Qes)0.42
Total Q (Qts)0.38
Compliance Equivalent Volume (Vas)0.82ft³
Mechanical Compliance of Suspension (Cms)0.37mm/N
BL Product (BL)9.6T·m
Diaphragm Mass Inc. Airload (Mms)16g
Maximum Linear Excursion (Xmax)3mm
Surface Area of Cone (Sd)210cm²

Materials of Construction

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

Mounting Information

Overall Outside Diameter8.24"
Baffle Cutout Diameter7.13"
Depth3.5"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.4ft³
Sealed F3150Hz
Vented Volume0.6ft³
Vented F375Hz

Specifications

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