Eighteen Sound 15NLW9500

Subwoofer

Nominal diameter15″ / 380 mm
Resonance34 Hz
Q factor0.29
Sensitivity93.8 dB
Linear excursion± 9 mm
Program Power1400 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 93.8dB
  • Frequency response 42 - 2000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 34Hz
  • Mechanical quality factor QMS 7.84
  • Electrical quality factor QES 0.30
  • Total quality factor QTS 0.29

Large signal parameters

  • Maximum linear excursion xmax 9mm
  • Air volume displaced at xmax VD 765cm³
  • Power handling P 1000W
  • Program power Pmax 1400W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 2.7Ω
  • Inductance (1kHz) LE 0.58mH
  • VC Diameter 100mm
  • Winding material Copper

Magnet

  • Force factor Bl 18.2N/A
  • Motor constant Bl/√RE 11.1N/√W
  • Material Neodymium

Diaphragm

  • Effective diameter 329mm
  • Effective area SD 850cm²
  • Moving mass MMS 172g
  • Moving mass (without air load) MMD 155g

Suspensions

  • Stiffness KMS 7.87N/mm
  • Compliance CMS 127µm/N
  • Equivalent volume to the compliance VAS 148L
  • Mechanical resistance RMS 4.69N·s/m

Dimensions

  • Nominal diameter 15
  • 380mm
  • Overall diameter 387mm
  • Baffle cutout diameter 353mm
  • Overall depth 177mm
  • Flange thickness 24mm
  • Mounting depth 153mm
  • Volume occupied by the driver (estimated) 3.9L
  • Net weight 7.0kg
Eighteen Sound 15NLW9500 Impedance
Eighteen Sound 15NLW9500 SPL
Eighteen Sound 15NLW9500 Dimensions

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