DS18 GEN-X154D

2x4Ω

Subwoofer

Nominal diameter15″ / 395 mm
Resonance38 Hz
Q factor0.65
Sensitivity88.9 dB
Linear excursion± 17.8 mm
Program power1000 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

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 88.9dB
  • Frequency response 18 - 250Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 38Hz
  • Mechanical quality factor QMS 6.34
  • Electrical quality factor QES 0.88
  • Total quality factor QTS 0.65

Large signal parameters

  • Maximum linear excursion (one way) xmax 17.8mm
  • Air volume displaced at xmax VD 1432cm³
  • Power handling P 500W
  • Program power Pmax 1000W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 6.4Ω
  • Inductance (1kHz, in series) LE 6.5mH
  • VC Diameter 50.8mm
  • Winding material SV
  • Former material Black Aluminum

Magnet

  • Force factor (in series) Bl 21.9N/A
  • Motor constant Bl/√RE 8.67N/√W
  • Diameter 166mm
  • Weight 1.984kg
  • Material Ferrite

Diaphragm

  • Effective diameter 320mm
  • Effective area SD 804cm²
  • Moving mass (including air load) MMS 280g
  • Moving mass MMD 264g
  • Material Paper

Suspensions

  • Stiffness KMS 18.5N/mm
  • Compliance CMS 54µm/N
  • Equivalent volume to the compliance VAS 49.4L
  • Mechanical resistance RMS 10.6N·s/m
  • Surround material Foam

Dimensions

  • Nominal diameter 15
  • 395mm
  • Overall diameter 395mm
  • Baffle cutout diameter 356mm
  • Overall depth 202mm
  • Flange thickness 8mm
  • Mounting depth 194mm
  • Volume occupied by the driver (estimated) 5.3L
  • Frame material Steel

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