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Eminence Definimax 4018LF - 8 ohm - Woofer

Eminence Definimax 4018LF - 8 ohm - Woofer
Ship weight
11.82 kg
Priced per
8 ohm
  • Details
  • Additional Information

Recommended for professional audio and bass as a low distortion sub-woofer in single or multi-driver designs.

Speaker Detail
Nominal Basket Diameter18", 457 mm
Nominal Impedance*8 Ω
Power Rating*
Program Power2400 W
Watts1200 W
Resonance30 Hz
Usable Frequency Range31 Hz - 0.2 kHz
Sensitivity*94.9 dB
Magnet Weight109 oz.
Gap Height0.375", 9.5 mm
Voice Coil Diameter4", 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 Displaced0.234 cu.ft. / 6.62 liters
Overall Diameter18", 457.2 mm
Baffle Hole Diameter16.56", 420.6 mm
Front Sealing GasketYes
Rear Sealing GasketYes
Mounting Holes Diameter0.28", 7.1mm
Mounting Holes B.C.D.17.25", 438.2mm
Depth8.13", 206.5 mm
Net Weight24 lbs, 10.89 kg
Shipping Weight26 lbs, 11.79 kgs
Materials of Construction
Coil ConstructionCopper voice coil
Coil FormerPolyimide former
Magnet CompositionFerrite magnet
Core DetailsUndercut with aluminum shorting ring and Core Periphery Ventilation
Basket MaterialsDie-cast aluminum basket
Cone CompositionWater resistant paper cone
Cone Edge CompositionCloth cone edge
Dust Cap CompositionWater resistant treated paper dust cap

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