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Eminence Definimax 4018LF 18" Speaker Driver

Eminence Speaker
Part #290-579

Eminence Definimax 4018LF 18" Speaker Driver

Eminence Speaker
Part #290-579  
Model: Definimax 4018LF
The Eminence Definimax 4018LF 18" driver is recommended for professional audio and bass as a low distortion subwoofer in single or multi-driver speaker designs.
Key Features
  • Copper voice coil with Polyimide former
  • Ferrite magnet
  • Undercut pole piece with copper shorting ring and Core Periphery Ventilation
  • Die-cast aluminum basket
  • Acrylic wetlook paper cone and dust cap
  • Cloth cone edge
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Overview

Eminence Definimax 4018LF 18" Speaker Driver

The Eminence Definimax 4018LF 18" driver is recommended for professional audio and bass as a low distortion subwoofer in single or multi-driver speaker designs.

Product Details

BrandEminence Speaker
ModelDefinimax 4018LF
Part Number290-579
UPC876358000579
Unit of MeasureEach
Weight29

Product Specifications

Nominal Diameter18"
Power Handling (RMS)1200 Watts
Power Handling (MAX)2400 Watts
Impedance8Ω
Frequency Response39 to 1,200Hz
Sensitivity94.9dB 2.83V/1m
Voice Coil Diameter4"

Thiele-Small Parameters

Resonant Frequency (Fs)30Hz
DC Resistance (Re)6.1Ω
Voice Coil Inductance (Le)4.54mH
Mechanical Q (Qms)11.95
Electromagnetic Q (Qes)0.35
Total Q (Qts)0.34
Compliance Equivalent Volume (Vas)9ft³
Mechanical Compliance of Suspension (Cms)0.13mm/N
BL Product (BL)26.75T·m
Diaphragm Mass Inc. Airload (Mms)217g
Maximum Linear Excursion (Xmax)8.57mm
Surface Area of Cone (Sd)1188cm²

Materials of Construction

Cone MaterialCoated Paper
Surround MaterialCloth
Voice Coil Wire MaterialCopper
Voice Coil FormerKapton® / Polyimide
Basket / Frame MaterialCast Aluminum
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter18"
Baffle Cutout Diameter16.57"
Depth8.13"
# Mounting Holes8

Parts Express Staff Recommended Enclosure Volume

Sealed Volume2.9ft³
Sealed F382Hz
Vented Volume5ft³
Vented F340Hz

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