The 18NLS4000 represents the latest 18sound technology for high quality, low distortion applications, in low tuning, compact subwoofers suitable for HIFI and high power cinema usage. A 52mm long state of the art interleaved sandwich voice coil, together with an ultra long excursion rubber roll suspension system, work together to create a usable Xvar of +-25mm. A single demodulating ring is lowering distortion at very low frequencies to assure maximum fidelity and clarity even at the highest excursions.
Specifications
Design
Parameters
Mounting and Shipping Info
Nominal Impedance4 Ω
Minimum Impedance3.5 Ω
Nominal Power Handling11200 W
Continuous Power Handling22400 W
Sensitivity388.0 dB
Frequency Range28 - 500 Hz
Voice Coil Diameter100 mm (4.0 in)
Winding Depth52.0 mm (2.05 in)
Magnetic Gap Depth15.0 mm (0.59 in)
Surround ShapeSingle roll - High quality foam
Cone ShapeStraight
Magnet MaterialNeo
Woofer Cone TreatmentReinforced, water repellent, treated paper
Recommended Enclosure100.0 dm3 (3.53 ft3)
Recommended Tuning28 Hz
Resonance Frequency27 Hz
Re2.9 Ω
Qes0.36
Qms13.7
Qts0.35
Vas168.0 dm3 (5.93 ft3)
Sd1225.0 cm2 (189.88 in2)
η₀0.9 %
Xmax22.3 mm
Xvar25.0 mm
Mms433.0 g
Bl24.2 Txm
Le2.6 mH
EBP75 Hz
Overall Diameter462 mm (18.19 in)
Bolt Circle Diameter439 mm (17.28 in)
Baffle Cutout Diameter420.0 mm (16.54 in)
Depth250 mm (9.84 in)
Flange and Gasket Thickness24 mm (0.94 in)
Net Weight12.0 kg (26.46 lb)
Shipping Weight12.8 kg (28.22 lb)
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.
