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Dsjgooh2
Dvm2h24b
Alternative/Current Model:
18TLW3000

Features

  • 95 dB SPL 1W / 1m average sensitivity
  • Dual 115mm (4,5 in) Tetracoil Aluminum Voice coil
  • 4000 W program power handling
  • Ultra linear suspension behavior for excellent sound clarity
  • Symmetric flux density and inductance behaviour
  • Low noise forced air cooling design
  • Water repellent cone and epoxy coated plates
  • Suitable for vented, horn loaded and bandpass applications

The 18NTLW5000 is a 18 inch diameter next generation high performance subwoofer, specifically designed for high SPL very low frequency applications in either a reflex, bandpass or horn loaded configuration. For optimum results we recommend the usage of power amplifiers able to deliver 4000W program power without clipping.
The 18NTLW5000 uses Eighteen Sound proprietary Tetracoil technology, where two different, axially separated magnetic gaps and two inside-outside 4.5" diameter aluminum voice coils are wound on the same former and suspended evenly in the two magnetic gaps.
The Tetracoil design key advantages are:
1) a symmetric flux density versus displacement behavior, that minimizes the even distortion products;
2) a very symmetric and flat inductance curve;
3) the equivalent voice coil diameter of a 4.6" Tetracoil speaker is greater than 6". Consequently heat dissipation occurs over a larger surface area, driving AES power handling up to 1800 W.
18NTLW5000 design features include a large displacement suspension system which, in conjunction with a fiberglass reinforced, straight ribbed cone allows an ultra-linear piston action and provides full mechanical control across the entire working range.
In order to furtherly increase power handling and reduce power compression figure, a low density material air diffractor is placed into the backplate venting hole acting as a cooling system, increasing power handling capability and lowering the power compression figure.
18NTLW5000 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 membrane. In addition, magnetic structure metal plates coating is far more resistant than standard zinc coating to the corrosive effects of salts and oxidization.

Specifications

Design

Parameters

Mounting and Shipping Info

  • Nominal Impedance8 Ω
  • Minimum Impedance6.8 Ω
  • Nominal Power Handling11800 W
  • Continuous Power Handling24000 W
  • Sensitivity395.0 dB
  • Frequency Range30 - 1800 Hz
  • Voice Coil Diameter115 mm (4.5 in)
  • Winding Materialaluminum
  • Surround ShapeTriple roll
  • Cone ShapeCurvilinear
  • Magnet MaterialNeo
  • Woofer Cone TreatmentWater,UV repellent
  • Recommended Enclosure180.0 dm3 (6.36 ft3)
  • Recommended Tuning35 Hz
  • Resonance Frequency32 Hz
  • Re5.5 Ω
  • Qes0.33
  • Qms8.52
  • Qts0.32
  • Vas176.0 dm3 (6.22 ft3)
  • Sd1156.0 cm2 (179.18 in2)
  • Xmax17.5 mm
  • Mms295.0 g
  • Bl31.3 Txm
  • Le1.85 mH
  • EBP96 Hz
  • Overall Diameter462 mm (18.19 in)
  • Bolt Circle Diameter440 mm (17.32 in)
  • Baffle Cutout Diameter416.0 mm (16.38 in)
  • Depth310 mm (12.2 in)
  • Flange and Gasket Thickness26 mm (1.02 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 nominal 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.