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Eminence Definimax 4018LF 18" Speaker Driver

Brand:|Model: Definimax 4018LF|Part # 290-579


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.
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Part # 290-579
Highlights
  • 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




Product Details

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 Specifications
  • Nominal Diameter18"
  • Power Handling (RMS)1,200 Watts
  • Power Handling (max)2400 Watts
  • Impedance8 ohms
  • Frequency Response31 to 200 Hz
  • Sensitivity94.9 dB 1W/1m
  • Voice Coil Diameter4"
  • Magnet Weight109 oz.
Thiele-Small Parameters
  • Resonant Frequency (Fs)30 Hz
  • DC Resistance (Re)6.1 ohms
  • Voice Coil Inductance (Le)4.54 mH
  • Mechanical Q (Qms)11.95
  • Electromagnetic Q (Qes)0.35
  • Total Q (Qts)0.34
  • Compliance Equivalent Volume (Vas)9 ft.³
  • Mechanical Compliance of Suspension (Cms)0.13 mm/N
  • BL Product (BL)26.75 Tm
  • Diaphragm Mass Inc. Airload (Mms)217g
  • Maximum Linear Excursion (Xmax)8.57 mm
  • Surface Area of Cone (Sd)1188 cm²
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
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume2.5 ft.³
  • Sealed F368 Hz
  • Vented Volume4.3 ft.³
  • Vented F345 Hz
Eminence Definimax 4018LF 18" Speaker Driver
  • BrandEminence Speaker
  • ModelDefinimax 4018LF
  • Part Number290-579
  • UPC876358000579
  • Product CategoryPro Woofers, Subwoofers & Midrange Speakers
  • Unit of MeasureEA
  • Product Rating
    (2 Reviews)
  • Weight29 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Eminence Definimax 4018LF 18" Speaker Driver

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Eminence Definimax 4018LF 18" Speaker Driver

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