Eighteen Sound 15W930

Subwoofer

Nominal diameter15″ / 380 mm
Resonance33 Hz
Q factor0.22
Sensitivity96.8 dB
Linear excursion± 7.5 mm
Program Power800 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 96.8dB
  • Frequency response 50 - 3600Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 33Hz
  • Mechanical quality factor QMS 8.78
  • Electrical quality factor QES 0.23
  • Total quality factor QTS 0.22

Large signal parameters

  • Maximum linear excursion xmax 7.5mm
  • Air volume displaced at xmax VD 638cm³
  • Power handling P 500W
  • Program power Pmax 800W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.5Ω
  • Inductance (1kHz) LE 1.47mH
  • VC Diameter 75mm
  • Winding material Copper

Magnet

  • Force factor Bl 22.1N/A
  • Motor constant Bl/√RE 9.42N/√W
  • Material Ferrite

Diaphragm

  • Effective diameter 329mm
  • Effective area SD 850cm²
  • Moving mass MMS 97g
  • Moving mass (without air load) MMD 79.5g
  • Material Weather protected

Suspensions

  • Stiffness KMS 4.17N/mm
  • Compliance CMS 240µm/N
  • Equivalent volume to the compliance VAS 240L
  • Mechanical resistance RMS 2.29N·s/m

Dimensions

  • Nominal diameter 15
  • 380mm
  • Overall diameter 393mm
  • Baffle cutout diameter 360mm
  • Overall depth 185mm
  • Flange thickness 14mm
  • Mounting depth 171mm
  • Volume occupied by the driver (estimated) 4.4L
  • Net weight 8.0kg
Eighteen Sound 15W930 Impedance
Eighteen Sound 15W930 SPL
Eighteen Sound 15W930 Dimensions

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