Nominal Basket Diameter: 18 in., 457.2mm

Impedance: 8 ohms

Power Rating: 1250W rms

Music Program: 2500W

Resonance: 33Hz

Usable Frequency Range: 25Hz - 600Hz

Average Sensitivity 1W @ 1m: 97dB

Magnet Weight: 109 oz.

Gap Height: 0.375 in., 9.52mm

Voice Coil Diameter: 4 in., 101.6mm

Overall Diameter: 18 in., 457.2mm

Baffle Hole Diameter: 16.56 in., 420mm

Front Sealing Gasket: fitted as standard

Rear Sealing Gasket: fitted as standard

Fixing Holes Diameter: 0.275 in., 6.4mm

Fixing Hole B.C.D.: 17.25 in., 438.2mm

Depth: 8.15 in., 207mm

Shipping Weight: 32 lbs, 14.6 kg

Resonant Frequency: 33Hz

Impedance (RE): 5.84 ohms

Coil Inductance (Le): 2.38mH

Electromagnetic Q (Qes): 0.58

Mechanical Q (Qms): 14.24

Total Q (Qts): 0.56

Compliance Equivalent Volume (Vas): 239.9 liters, 8.47 cu. ft.

Peak Diaphragm Displacement Volume (Vd): 1141cc

Mechanical Compliance of suspension (Cms): 0.13mm/N

BL Product (BL): 19.7 T-M

Diaphragm Mass inc. Airload (Mms): 186 grams

Equiv. Resistance of mechanical suspension loss (Rms): 2.69N*sec/M

Efficiency Bandwidth Product (EBP): 57

Voice Coil Overhang (Xmax): 9.8mm

Surface Area of Cone (Sd): 1159cm2

Impedance at Resonance (Zmax): 150 ohms

Important Note

Watts: The guaranteed long term power rating throughout the usable frequency range of the speaker.

(Translation: the speaker will operate continuously at any frequency within the speakers specified frequency range when driven at this power. The "Watts" rating is similar to RMS, but is really more indicative of long term thermal capability.)

Music Program: The speaker will safely and reliably handle the varying frequencies of musical content at this power rating. The "Music Program" rating is more indicative of what you can expect in the real world with the speaker operating within the appropriate enclosure reproducing music or vocal audio program.

Dimensions and Weight in Packaging

8 Ohms

Shipping Weight: 28.5 lbs

Shipping Dimensions: 20 x 19 x 9 in

Manufacturer Part Number (MPN): KILO18A