Eminence DEFINIMAX 4018LF 18" Professional Pro Audio Replacement Woofer 2400W

SPECIFICATION

Nominal Basket Diameter

• 18", 457 mm

Nominal Impedance*

• 8 Ω

Power Rating*

Program Power

• 2400 W

Watts

• 1200 W

Resonance

• 30 Hz

Usable Frequency Range

• 31 Hz - 0.2 kHz

Sensitivity*

• 94.9 dB

Magnet Weight

• 109 oz.

Gap Height

• 0.375", 9.5 mm

Voice Coil Diameter

• 4", 102 mm

THIELE & SMALL PARAMETERS

Resonant Frequency (fs)

• 30 Hz

DC Resistance (Re)

• 6.1 Ω

Coil Inductance (Le)

• 4.54m H

Mechanical Q (Qms)

• 11.95

Electromagnetic Q (Qes)

• 0.35

Total Q (Qts)

• 0.34

Compliance Equivalent Volume (Vas)

• 254.71 liters / 9 cu.ft.

Peak Diaphragm Displacement Volume (Vd)

• 1018.1 cc

Mechanical Compliance of Suspension (Cms)

• 0.13 mm/N

BL Product (BL)

• 26.75 T-M

Diaphragm Mass Inc. Airload (MMs)

• 217 grams

Efficiency Bandwidth Product (EBP)

• 86

Maximum Linear Excursion (Xmax)

• 8.57 mm

Surface Area of Cone (Sd)

• 1188 cm2

Maximum Mechanical Limit (Xlim)

• 15.9 mm

MOUNTING INFORMATION

Recommended Enclosure Volume

Sealed

• N/a

Vented

• 99.11-226.54 liters / 3.5-8 cu.ft.

Driver Volume Displaced

• 0.234 cu.ft. / 6.62 liters

Overall Diameter

• 18", 457.2 mm

Baffle Hole Diameter

• 16.56", 420.6 mm

Front Sealing Gasket

• Yes

Rear Sealing Gasket

• Yes

Mounting Holes Diameter

• 0.28", 7.1mm

Mounting Holes B.C.D.

• 17.25", 438.2mm

Depth

• 8.13", 206.5 mm

Net Weight

• 24 lbs, 10.89 kg

Shipping Weight

• 26 lbs, 11.79 kgs

MATERIALS OF CONSTRUCTION

Coil Construction

• Copper voice coil

Coil Former

• Polyimide former

Magnet Composition

• Ferrite magnet

Core Details

• Undercut with aluminum shorting ring and Core Periphery Ventilation

Basket Materials

• Die-cast aluminum basket

Cone Composition

• Water resistant paper cone

Cone Edge Composition

• Cloth cone edge

Dust Cap Composition

• Water resistant treated paper dust cap