Eminence Definimax 4018LF - 18" 800W 8 Ohm

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 / 3.50-8.00 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