Eighteen Sound 18NTLW5000

Subwoofer

Nominal diameter18″ / 462 mm
Resonance32 Hz
Q factor0.30
Sensitivity94 dB
Linear excursion± 17.5 mm
Program Power4000 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 35 - 1000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 32Hz
  • Mechanical quality factor QMS 9.50
  • Electrical quality factor QES 0.31
  • Total quality factor QTS 0.30

Large signal parameters

  • Maximum linear excursion xmax 17.5mm
  • Air volume displaced at xmax VD 2144cm³
  • Power handling P 1800W
  • Program power Pmax 4000W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.1Ω
  • Inductance (1kHz) LE 1.23mH
  • VC Diameter 115mm
  • Winding material Aluminum

Magnet

  • Force factor Bl 25N/A
  • Motor constant Bl/√RE 14.2N/√W

Diaphragm

  • Effective diameter 395mm
  • Effective area SD 1225cm²
  • Moving mass MMS 306g
  • Moving mass (without air load) MMD 276g
  • Material Water,UV repellent

Suspensions

  • Stiffness KMS 12.3N/mm
  • Compliance CMS 81µm/N
  • Equivalent volume to the compliance VAS 165L
  • Mechanical resistance RMS 6.48N·s/m

Dimensions

  • Nominal diameter 18
  • 462mm
  • Overall diameter 462mm
  • Baffle cutout diameter 416mm
  • Overall depth 310mm
  • Flange thickness 26mm
  • Mounting depth 284mm
  • Volume occupied by the driver (estimated) 8.8L
  • Net weight 12.0kg
Eighteen Sound 18NTLW5000 Impedance
Eighteen Sound 18NTLW5000 SPL
Eighteen Sound 18NTLW5000 Dimensions

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