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Alternative/Current Model:


  • 115mm (4.5in) Interleaved Sandwich Voice coil (ISV)
  • Weather protected cone and plates
  • Great heat dissipation capability
  • Ultra linear suspension system
  • Neo motor for high power and very efficient thermal
  • exchange
  • Single demodulating ring (SDR) for distortion reduction and maximum SPL
The 15NLW4500 is a 15" extended low frequency loudspeaker, designed for use in vented, bandpass or even horn loaded ì enclosures. The loudspeaker is designed to withstand high power levels without damage while providing clean and undistorted LF reproduction at a very high SPL. For optimum results we recommend amplifiers able to deliver 3000 Watt program power. The 15NLW4500 features a unique motor featuring a high grade Neo magnet assembly in a structure optimized for thermal and magnetic efficiency. 15NLW4500 features include a large displacement suspension system which, in conjunction with a composite reinforced, straight ribbed cone and the Eighteen Sound proprietary SDR technology, allows an undiostorted ultra-linear piston action and provides full mechanical control across the entire working range. The 115mm (4.5 in) state-of-the-art voice-coil utilizing Interleaved Sandwich Voice coil (ISV) technology, provides high levels of thermal stability and durability. The ISV technology achieves a balanced linear motor unit exerting an exceptionally high force factor.




Mounting and Shipping Info

  • Nominal Impedance8 Ω
  • Minimum Impedance6.7 Ω
  • Nominal Power Handling11500 W
  • Continuous Power Handling23000 W
  • Sensitivity396.3 dB
  • Frequency Range40 - 1000 Hz
  • Voice Coil Diameter115 mm (4.53 in)
  • Recommended Enclosure50.0 dm3 (1.77 ft3)
  • Recommended Tuning45 Hz
  • Resonance Frequency35 Hz
  • Re5.4 Ω
  • Qes0.27
  • Qms7.8
  • Qts0.26
  • Vas111.0 dm3 (3.92 ft3)
  • Sd881.0 cm2 (136.56 in2)
  • η₀1.7 %
  • Xmax14.5 mm
  • Xvar12.0 mm
  • Mms201.0 g
  • Bl29.7 Txm
  • Le1.62 mH
  • EBP129 Hz
  • Overall Diameter393 mm (15.47 in)
  • Bolt Circle Diameter371 mm (14.61 in)
  • Baffle Cutout Diameter356.0 mm (14.02 in)
  • Depth199 mm (7.83 in)
  • Flange and Gasket Thickness15 mm (0.61 in)
  • Net Weight11.4 kg (25.13 lb)
  • Shipping Weight12.6 kg (27.78 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.
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