ALPINE S2-W8D4

2x2Ω
2x4Ω

Subwoofer

Nominal diameter8″ / 200 mm
Resonance47.9 Hz
Q factor0.64
Sensitivity83.1 dB
Linear excursion± 13 mm
Program power600 W
ALPINE S2-W8D4 SubwooferALPINE S2-W8D4 SubwooferALPINE S2-W8D4 Subwoofer
Excursion
Velocity
SPL
Phase
Group delay
Frequency
Hz
Impedance
Ω
Impedance phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical phase
°
Group delay
ms
Transient response
ms
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Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 83.1dB
  • Frequency response 23 - 215Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 47.9Hz
  • Mechanical quality factor QMS 5.90
  • Electrical quality factor QES 0.74
  • Total quality factor QTS 0.64

Large signal parameters

  • Maximum linear excursion (one way) xmax 13mm
  • Maximum excursion before damage xlim 20mm
  • Air volume displaced at xmax VD 252cm³
  • Power handling P 300W
  • Program power Pmax 600W
  • Peak power Ppeak 900W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 7.2Ω
  • Inductance (1kHz, in series) LE 4.44mH
  • VC Diameter 35.6mm
  • Former material Aluminum

Magnet

  • Force factor (in series) Bl 15.2N/A
  • Motor constant Bl/√RE 5.66N/√W
  • Diameter 120mm
  • Weight 0.96kg
  • Material Strontium Ferrite

Diaphragm

  • Effective diameter 157mm
  • Effective area SD 194cm²
  • Moving mass (including air load) MMS 78.9g
  • Moving mass MMD 77.3g
  • Material PP / Carbon Fiber

Suspensions

  • Stiffness KMS 7.14N/mm
  • Compliance CMS 140µm/N
  • Equivalent volume to the compliance VAS 7.5L
  • Mechanical resistance RMS 4.02N·s/m
  • Surround material HAMR
  • Spider material Progressive Spider

Dimensions

  • Nominal diameter 8″
  • 200mm
  • Overall diameter 196mm
  • Baffle cutout diameter 178mm
  • Overall depth 117mm
  • Flange thickness 23mm
  • Mounting depth 94mm
  • Volume occupied by the driver 0.85L
  • Frame material Steel
Impedance
Step response
Tone burst
ALPINE S2-W8D4 Dimensions
PDF fileDatasheet

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