DS18 SRW12.4D

4Ω
2x4Ω

Shallow Subwoofer

Nominal diameter12″ / 316 mm
Resonance54 Hz
Q factor0.96
Sensitivity88.4 dB
Program Power440 W
DS18 SRW12.4D Shallow SubwooferDS18 SRW12.4D Shallow SubwooferDS18 SRW12.4D Shallow Subwoofer
Excursion
Velocity
SPL
Phase
Group delay
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 88.4dB
  • Frequency response 26 - 250Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 54Hz
  • Mechanical quality factor QMS 4.24
  • Electrical quality factor QES 1.23
  • Total quality factor QTS 0.96

Large signal parameters

  • Power handling P 220W
  • Program power Pmax 440W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 6.9Ω
  • Inductance (1kHz, in series) LE 1.58mH
  • VC Diameter 50.8mm
  • Winding material SV
  • Former material Aluminum

Magnet

  • Force factor (in series) Bl 15.6N/A
  • Motor constant Bl/√RE 5.94N/√W
  • Diameter 140mm
  • Weight 1.276kg
  • Material Ferrite

Diaphragm

  • Effective diameter 260mm
  • Effective area SD 531cm²
  • Moving mass MMS 128g
  • Moving mass (without air load) MMD 119g
  • Material Paper

Suspensions

  • Stiffness KMS 14.9N/mm
  • Compliance CMS 67µm/N
  • Equivalent volume to the compliance VAS 26.6L
  • Mechanical resistance RMS 10.2N·s/m
  • Surround material Rubber

Dimensions

  • Nominal diameter 12″
  • 316mm
  • Overall diameter 316mm
  • Baffle cutout diameter 279mm
  • Overall depth 105mm
  • Flange thickness 15mm
  • Mounting depth 90mm
  • Volume occupied by the driver 2.12L
  • Frame material Steel
Impedance
Step response
Tone Burst
DS18 SRW12.4D Dimensions
PDF fileDatasheet

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