Eighteen Sound 15NLW4500 8Ω

Subwoofer

Nominal diameter15″ / 393 mm
Resonance35 Hz
Q factor0.26
Sensitivity93.9 dB
Linear excursion± 14.5 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 93.9dB
  • Frequency response 40 - 1000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 35Hz
  • Mechanical quality factor QMS 7.80
  • Electrical quality factor QES 0.27
  • Total quality factor QTS 0.26

Large signal parameters

  • Maximum linear excursion xmax 14.5mm
  • Air volume displaced at xmax VD 1278cm³
  • Power handling P 1500W
  • Program power Pmax 3000W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.4Ω
  • Inductance (1kHz) LE 1.62mH
  • VC Diameter 115mm

Magnet

  • Force factor Bl 29.7N/A
  • Motor constant Bl/√RE 12.8N/√W

Diaphragm

  • Effective diameter 335mm
  • Effective area SD 881cm²
  • Moving mass MMS 201g
  • Moving mass (without air load) MMD 183g

Suspensions

  • Stiffness KMS 9.71N/mm
  • Compliance CMS 103µm/N
  • Equivalent volume to the compliance VAS 111L
  • Mechanical resistance RMS 5.67N·s/m

Dimensions

  • Nominal diameter 15
  • 393mm
  • Overall diameter 393mm
  • Baffle cutout diameter 356mm
  • Overall depth 199mm
  • Flange thickness 15mm
  • Mounting depth 184mm
  • Volume occupied by the driver (estimated) 5.8L
  • Net weight 11.4kg
Eighteen Sound 15NLW4500 8Ω Impedance
Eighteen Sound 15NLW4500 8Ω SPL
Eighteen Sound 15NLW4500 8Ω Dimensions

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