GRS 8SW-4

4HE
4Ω

Subwoofer

Nominal diameter8″ / 209 mm
Resonance48 Hz
Q factor0.89
Sensitivity86 dB
Linear excursion± 6 mm
Program power160 W
GRS 8SW-4 SubwooferGRS 8SW-4 SubwooferGRS 8SW-4 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 86dB
  • Frequency response 40 - 800Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 48Hz
  • Mechanical quality factor QMS 4.33
  • Electrical quality factor QES 1.13
  • Total quality factor QTS 0.89

Large signal parameters

  • Maximum linear excursion (one way) xmax 6mm
  • Air volume displaced at xmax VD 130cm³
  • Power handling P 80W
  • Program power Pmax 160W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.8Ω
  • Inductance (1kHz) LE 0.8mH
  • VC Diameter 38mm

Magnet

  • Force factor Bl 5.8N/A
  • Motor constant Bl/√RE 2.98N/√W
  • Diameter 110mm

Diaphragm

  • Effective diameter 166mm
  • Effective area SD 217cm²
  • Moving mass (including air load) MMS 33.2g
  • Moving mass MMD 30.8g
  • Material Polypropylene

Suspensions

  • Stiffness KMS 3.03N/mm
  • Compliance CMS 330µm/N
  • Equivalent volume to the compliance VAS 22L
  • Mechanical resistance RMS 2.31N·s/m
  • Surround material Butyl rubber

Dimensions

  • Nominal diameter 8″
  • 209mm
  • Overall diameter 209mm
  • Baffle cutout diameter 198mm
  • Overall depth 108mm
  • Flange thickness 5mm
  • Mounting depth 100mm
  • Volume occupied by the driver (estimated) 0.97L
Impedance
SPL
GRS 8SW-4 Impedance
GRS 8SW-4 SPL
GRS 8SW-4 Dimensions
PDF fileDatasheet

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