Eighteen Sound 18NLW4100

Subwoofer

Nominal diameter18″ / 462 mm
Resonance29 Hz
Q factor0.27
Sensitivity94 dB
Linear excursion± 15 mm
Program Power3000 W
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 94dB
  • Frequency response 30 - 800Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 29Hz
  • Mechanical quality factor QMS 11.90
  • Electrical quality factor QES 0.28
  • Total quality factor QTS 0.27

Large signal parameters

  • Maximum linear excursion xmax 15mm
  • Air volume displaced at xmax VD 1838cm³
  • Power handling P 1500W
  • Program power Pmax 3000W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 2.5Ω
  • Inductance (1kHz) LE 1.55mH
  • VC Diameter 100mm

Magnet

  • Force factor Bl 22.8N/A
  • Motor constant Bl/√RE 14.4N/√W
  • Material Neodymium

Diaphragm

  • Effective diameter 395mm
  • Effective area SD 1225cm²
  • Moving mass MMS 314g
  • Moving mass (without air load) MMD 284g
  • Material Weather protected

Suspensions

  • Stiffness KMS 10.4N/mm
  • Compliance CMS 96µm/N
  • Equivalent volume to the compliance VAS 207L
  • Mechanical resistance RMS 4.81N·s/m

Dimensions

  • Nominal diameter 18
  • 462mm
  • Overall diameter 462mm
  • Baffle cutout diameter 416mm
  • Overall depth 232mm
  • Flange thickness 23mm
  • Mounting depth 209mm
  • Volume occupied by the driver (estimated) 6.5L
  • Net weight 10.0kg
Eighteen Sound 18NLW4100 Impedance
Eighteen Sound 18NLW4100 SPL
Eighteen Sound 18NLW4100 Dimensions

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