Eminence DEFINIMAX 4018LF – 1600W 18 8 Ohm Subwoofer Loudspeaker Driver

Overview

The Eminence DEFINIMAX 4018LF is an 18-inch professional series low distortion PA woofer designed for high-power and low-distortion applications in single or multi-driver designs. This speaker is well-suited for professional audio and bass applications, offering a robust and powerful audio performance. Its key features include a large program power handling capacity, a wide usable frequency range, and high sensitivity, making it an excellent choice for demanding audio systems.

Features

• 18″ professional series low distortion PA woofer
• Ideal for high-power, low-distortion subwoofer applications
• Suitable for single or multi-driver designs
• Vented, scoop, and horn loading box type compatibility

Specifications

• Nominal Basket Diameter:18″, 457 mm
• Nominal Impedance:8
• 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
  • 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 cm
  • Maximum Mechanical Limit (Xlim): 15.9 mm
• Mounting Information:
  • Recommended Enclosure Volume: 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″, 438.1mm