View this product description in Norwegian.

KILOMAX PRO Serie 1250W
Recommended for professional audio subwoofer and woofer applications in sealed and vented enclosures. Not for horn-loading or scoops.
SPECIFICATION
Nominal Basket Diameter 18", 457.2 mm
Nominal Impedance 8 ohms
Power Rating Watts 1250 W / Music Program 2500 W
Resonance 33 Hz
Usable Frequency Range 33 Hz - 600 Hz
Sensitivity 95.5
Magnet Weight 109 oz.
Gap Height 0.375", 9.53 mm
Voice Coil Diameter 4", 101.6 mm
THIELE & Small Parameters
Resonant Frequency (fs) 33 Hz
DC Resistance (Re) 5.84
Coil Inductance (Le) 2.38 mH
Mechanical Q (Qms) 14.24
Electromagnetic Q (Qes) 0.58
Total Q (Qts) 0.56
Compliance Equivalent Volume (Vas) 239.9 liters / 8.5 cu. ft.
Peak Diaphragm Displacement Volume (Vd) 1136 cc
Mechanical Compliance of Suspension (Cms) 0.13 mm/N
BL Product (BL) 19.7 T-M
Diaphragm Mass inc. Airload (Mms) 186 grams
Efficiency Bandwidth Product (EBP) 57
Maximum Linear Excursion (Xmax) 9.8 mm
Surface Area of Cone (Sd) 1159.0 cm²
Maximum Mechanical Limit (Xlim) 19.1 mm
MOUNTING Information
Recommended Enclosure Volume
Sealed 133-147 liters/4.7-5.2 cu. ft.
Vented 144-258 liters/5.1-9.1 cu. ft.
Overall Diameter 18", 457.2 mm
Baffle Hole Diameter 16.56", 420.6 mm
Front Sealing Gasket fitted as standard
Rear Sealing Gasket fitted as standard
Mounting Holes Diameter 0.25", 6.4 mm
Mounting Holes B.C.D. 17.25", 438.2 mm
Depth 8.15", 207 mm
MATERIALS of Construction
Copper voice coil
Polyimide former
Ferrite magnet
Extended core with Core Periphery Ventilation
Die-cast aluminum basket
Paper Cone
Cloth cone edge
Porous cloth top spider/ heatsink