Recommended for professional audio
subwoofer and woofer applications
in sealed and vented enclosures. Not
for horn-loading or scoops.
SPECIFICATION :
Nominal Basket Diameter 18" , 457 mm
Nominal Impedance* 8 ©
Power Rating* *
Watts 1250 W
Music Program 2500 W
Resonance 32 Hz
Usable Frequency Range 33 Hz - 0.3 kHz
Sensitivity* * * 95.8 dB
Magnet Weight 109 oz.
Gap Height 0.375" , 9.5 mm
Voice Coil Diameter 4" , 102 mm
EMINENCE KILOMAX PRO 18A
THIELE & SMALL PARAMETERS :
Resonant Frequency ( fs) 32 Hz
DC Resistance ( Re) 5.07 ©
Coil Inductance ( Le) 1.59m H
Mechanical Q ( Qms) 10.15
Electromagnetic Q ( Qes) 0.49
Total Q ( Qts) 0.47
Compliance Equivalent Volume ( Vas) 331.5 liters / 11.71 cu.ft.
Peak Diaphragm Displacement Volume ( Vd) 1159 cc
Mechanical Compliance of Suspension ( Cms) 0.18 mm/ N
BL Product ( BL) 17.2 T-M
Diaphragm Mass Inc. Airload ( MMs) 143 grams
Efficiency Bandwidth Product ( EBP) 65
Maximum Linear Excursion ( Xmax) 10 mm
Surface Area of Cone ( Sd) 1159 cm2
Maximum Mechanical Limit ( Xlim) 19.2 mm
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 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 8.15" , 207 mm
Net Weight 27.4 lbs, 12.43 kg
Shipping Weight 30.9 lbs, 14.02 kgs
MATERIALS OF CONSTRUCTION :
Coil Construction Copper voice coil
Coil Former Kapton former
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