Eighteen Sound / 18 Sound 21NLW1400 21" Ferrite Speaker

Sale price$572.99


The Eighteen Sound / 18 Sound 21NLW1400 21" Ferrite Speaker

The 21NLW1400 is a 21 inch high performance extended low frequency loudspeaker. The transducer can be used as a subwoofer component, in either a reflex, band-pass or horn-loaded configuration, in high power auditorium or arena loudspeaker systems. It provides clean and undistorted LF reproduction at very high SPL and enables the speaker to withstand high power levels without damage. The 21NLW1400 design features include an exceptional displacement suspension system which, in conjunction with a carbon fiber reinforced straight-ribbed cone and the Double Silicon Spider (DSS), produces an ultra-linear piston action, providing full control across the entire working range. In addition, 8 air vents incorporated into the back plate are aligned with the voice coil to force air into the lower part of the gap. 21NLW1400 is ready to perform properly under inclement weather conditions. This has been achieved using of an exclusive treatment which improves pulp strength and gives water repellent properties to both sides of the cone. Moreover, a special treatment is applied to the top and back plate of the magnetic structure which is far more resistant to the corrosive effects of salts and oxidization than any other treatment in use.


  • 99 dB SPL 1W / 1m average sensitivity
  • 100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
  • 1400W AES power handling
  • Carbon fiber reinforced straight-ribbed cone
  • Double Silicon Spider (DSS) for improved excursion control and linearity
  • Double Demodulating Rings (DDR) for lower distortion
  • Improved heat dissipation via unique basket design
  • Weather protected cone and plates for outdoor usage
  • Suitable for ultra low frequency systems


  • Nominal Diameter 533 mm (21 in)
  • Rated Impedance 8 Ohm
  • AES Power 1400 W
  • Program Power 1600 W
  • Peak Power 7000 W
  • Sensitivity 99 dB
  • Frequency Range 24 - 2000 Hz

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