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Nominal Basket Diameter 18", 457.2mm
Nominal Impedance* 8 ohms
Power Rating**
Watts 1250W
Music Program 2500W
Resonance 32Hz
Usable Frequency Range 33Hz - 0.3kHz
Sensitivity*** 95.8dB
Magnet Weight 109 oz.
Gap Height 0.37", 9.53mm
Voice Coil Diameter 4", 101.6mm

Thiele & Small Parameters
Resonant Frequency (fs) 32Hz
DC Resistance (Re) 5.07
Coil Inductance (Le) 1.59mH
Mechanical Q (Qms) 10.15
Electromagnetic Q (Qes) 0.49
Total Q (Qts) 0.47
Compliance Equivalent Volume (Vas) 331.5 liters / 11.7 cu.ft.
Peak Diaphragm Displacement Volume (Vd) 1159cc
Mechanical Compliance of Suspension (Cms) 0.18mm/N
BL Product (BL) 17.2 T-M
Diaphragm Mass Inc. Airload (MMs) 143.17 grams
Efficiency Bandwidth Product (EBP) 64.9
Maximum Linear Excursion (Xmax) 10mm
Surface Area of Cone (Sd) 1159 cm2
Maximum Mechanical Limit (Xlim) 19.2mm
Mounting Information
Recommended Enclosure Volume
Sealed 104.8-172.7 liters / 3.7-6.1 cu.ft.
Vented 118.9-303 liters / 4.2-10.7 cu.ft.
Driver Volume Displaced 403.9 / 6.62 liters
Overall Diameter 18", 457.2mm
Baffle Hole Diameter 16.56", 420.6mm
Front Sealing Gasket Fitted as standard
Rear Sealing Gasket Fitted as standard
Mounting Holes Diameter 0.28", 7.1mm
Mounting Holes B.C.D. 17.25", 438.2mm
Depth 8.15", 207mm
Net Weight 27.4 lbs, 12.4 kg
Shipping Weight 30.9 lbs, 14 kgs
Materials of Construction
Coil Construction Copper voice coil
Coil Former Kapton
Magnet Composition Ferrite magnet
Core Details Extended core with Core Periphery Ventilation

Basket Materials Die-cast aluminum basket
Cone Composition Treated Paper-Kevlar
Cone Edge Composition Cloth cone edge
Dust Cap Composition Porous cloth top spider/ heatsink

Eminence KILOMAX PRO-18A

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