The 18NLW9400 is an 18 inch extended low frequency loudspeaker designed for high SPL subwoofer applications in either a reflex, bandpass or horn loaded configuration. For optimum results we recommend amplifiers able to deliver 2400 Watt program power without clipping. Transducer design features include a large displacement suspension system which, in conjunction with a fiberglass reinforced, straight ribbed cone and the Eighteen Sound proprietary Double Silicon Spider (DSS) technology, allows an ultra-linear piston action and provides full mechanical control across the entire working range. The 100 mm (4 in) inside-outside copper voice coil based on Interleaved Sandwich Voice coil (ISV) technology provides high levels of thermal stability and durability. In order to furtherly increase power handling and reduce power compression figure, 18NLW2400 uses the same voice coil ventilation technology developed for our flagship 9000 neodymium transducer series. A special low density material air diffractor has been placed into the backplate acting as a cooling system, increasing power handling capability and lowering the power compression figure. As a final result Eighteen Sound engineers obtained almost 1 dB reduction in full power power compression value if compared to 18LW1400, and an increased program power handling value of 2400 Watt.18NLW9400 is able to perform properly under inclement weather conditions: the exclusive cone treatment improves pulp strength and gives water repellent properties to both sides of the cone.
Mounting and Shipping Info
Nominal Impedance4 Ω
Minimum Impedance3.3 Ω
Nominal Power Handling11200 W
Continuous Power Handling22400 W
Frequency Range30 - 2500 Hz
Voice Coil Diameter100 mm (4.0 in)
Surround ShapeTriple roll
Woofer Cone TreatmentWeather protected
Recommended Enclosure220.0 dm3 (7.77 ft3)
Recommended Tuning35 Hz
Resonance Frequency32 Hz
Vas278.0 dm3 (9.82 ft3)
Sd1225.0 cm2 (189.88 in2)
Overall Diameter462 mm (18.19 in)
Bolt Circle Diameter438 mm (17.24 in)
Baffle Cutout Diameter416.0 mm (16.38 in)
Depth223 mm (8.8 in)
Flange and Gasket Thickness21 mm (0.83 in)
Net Weight8.7 kg (19.18 lb)
Shipping Weight10.0 kg (22.05 lb)
Shipping Box482 x 482 x 257 mm (18.98x18.98x10.12 in)
2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated minimum impedance. Loudspeaker in free air.
Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.