18-inch Drivers
LF-18X150
The LF-18X150 is an 18-inch ferrite subwoofer with a 6-inch copper voice coil for high-power subwoofer and bass cabinet systems. It handles 1800 W nominal (3600 W program) with 97 dB sensitivity and a 42–500 Hz response. Fs 47 Hz, overall diameter 460 mm. 6" inside/outside copper voice coil - 3600 W program power. Klippel DA LPM measured T/S parameters.
Specifications
- Nominal Diameter
- 460 mm / 18"
- Rated Impedance
- 8 ohm
- Sensitivity (1W/1m)
- 97 dB
- Frequency Range
- 42 - 500 Hz
- Voice Coil Diameter
- 150 mm / 6"
- Net Weight
- 29 kg
GENERAL SPECIFICATIONS
Nominal Diameter | 460 mm / 18" |
Rated Impedance | 8 ohm |
Nominal Power Handling | 1800 W |
Program Power | 3600 W |
Sensitivity (1W/1m) | 97 dB |
Frequency Range | 42 - 500 Hz |
Minimum Impedance (Zmin) | 7.6 ohm |
Voice Coil Diameter | 150 mm / 6" |
Voice Coil Material | Copper |
Former Material | Glass Fibre |
VC Winding Depth | 31 mm |
Number of Layers | 2 (inside / outside) |
Magnet Gap Depth | 14 mm |
Basket | Cast Aluminium |
Flux Density | 1.1 T |
Magnet Out Diameter / Weight | 330 mm / 333 oz |
MOUNTING INFORMATION
Overall Diameter | 461 mm |
Bolt Circle Diameter | 439 mm |
Bolt Hole Diameter | 6.5 x 9.5 mm |
Baffle Cut-out Diameter | 424 mm |
Overall Depth | 230 mm |
Air Volume Occupied by Driver | 12.5 liters |
Net Weight | 29 kg |
Shipping Weight | 30.4 kg |
Shipping Box | 490 x 490 x 245 mm |
THIELE-SMALL PARAMETERS
Fs (Resonance Frequency) | 47 Hz |
Re (DC Resistance) | 5.8 ohm |
Qms (Mechanical Factor) | 28.0 |
Qes (Electrical Factor) | 0.36 |
Qts (Total Factor) | 0.35 |
Cms (Compliance) | 0.013 mm/N |
Rms (Mechanical Resistance) | 3.3 kg/s |
Mms (Moving Mass) | 311 g |
Half-space Efficiency | 2.0 % |
BL Factor | 38.7 T.m |
Vas (Equivalent Air Load) | 71 liters |
Sd (Piston Area) | 1176 cm2 |
Xmax (Linear Excursion) | +/- 12 mm |
Xdam (Excursion before Damage) | +/- 27.5 mm |
Le (Voice Coil Inductance) | 2.1 mH |
EBP (Efficiency Bandwidth Product) | 130 |
