GRS 8SW-4HE

4HE
4Ω

Subwoofer

Nominal diameter8″ / 209 mm
Resonance24.9 Hz
Q factor0.45
Sensitivity81.9 dB
Linear excursion± 10.5 mm
Program power300 W
GRS 8SW-4HE SubwooferGRS 8SW-4HE SubwooferGRS 8SW-4HE Subwoofer
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
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 81.9dB
  • Frequency response 30 - 700Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 24.9Hz
  • Mechanical quality factor QMS 4.42
  • Electrical quality factor QES 0.51
  • Total quality factor QTS 0.45

Large signal parameters

  • Maximum linear excursion (one way) xmax 10.5mm
  • Air volume displaced at xmax VD 238cm³
  • Power handling P 150W
  • Program power Pmax 300W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.8Ω
  • Inductance (1kHz) LE 2.7mH
  • VC Diameter 50.8mm
  • Former material Aluminum

Magnet

  • Force factor Bl 10.5N/A
  • Motor constant Bl/√RE 5.39N/√W
  • Diameter 120mm

Diaphragm

  • Effective diameter 170mm
  • Effective area SD 227cm²
  • Moving mass (including air load) MMS 93.7g
  • Moving mass MMD 91.2g
  • Material Reinforced paper

Suspensions

  • Stiffness KMS 2.27N/mm
  • Compliance CMS 440µm/N
  • Equivalent volume to the compliance VAS 31.6L
  • Mechanical resistance RMS 3.32N·s/m
  • Surround material Rubber

Dimensions

  • Nominal diameter 8″
  • 209mm
  • Overall diameter 209mm
  • Baffle cutout diameter 181mm
  • Overall depth 128mm
  • Flange thickness 8mm
  • Mounting depth 117mm
  • Volume occupied by the driver (estimated) 1.2L
Impedance
SPL
GRS 8SW-4HE Impedance
GRS 8SW-4HE SPL
GRS 8SW-4HE Dimensions
PDF fileDatasheet

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