GRS 12SW-4HE

4HE
4Ω

Subwoofer

Nominal diameter12″ / 308 mm
Resonance22 Hz
Q factor0.43
Sensitivity84.3 dB
Linear excursion± 12.5 mm
Program power500 W
GRS 12SW-4HE SubwooferGRS 12SW-4HE SubwooferGRS 12SW-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 84.3dB
  • Frequency response 20 - 500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 22Hz
  • Mechanical quality factor QMS 4.08
  • Electrical quality factor QES 0.48
  • Total quality factor QTS 0.43

Large signal parameters

  • Maximum linear excursion (one way) xmax 12.5mm
  • Air volume displaced at xmax VD 630cm³
  • Power handling P 250W
  • Program power Pmax 500W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.9Ω
  • Inductance (1kHz) LE 3.5mH
  • VC Diameter 50.8mm
  • Former material aluminum

Magnet

  • Force factor Bl 16.2N/A
  • Motor constant Bl/√RE 8.2N/√W
  • Diameter 140mm
  • Height 40mm

Diaphragm

  • Effective diameter 253mm
  • Effective area SD 504cm²
  • Moving mass (including air load) MMS 237g
  • Moving mass MMD 229g
  • Material paper

Suspensions

  • Stiffness KMS 4.55N/mm
  • Compliance CMS 220µm/N
  • Equivalent volume to the compliance VAS 80.4L
  • Mechanical resistance RMS 8.03N·s/m
  • Surround material rubber

Dimensions

  • Nominal diameter 12″
  • 308mm
  • Overall diameter 308mm
  • Baffle cutout diameter 280mm
  • Overall depth 160mm
  • Flange thickness 12mm
  • Mounting depth 148mm
  • Volume occupied by the driver (estimated) 2.8L
Impedance
SPL
GRS 12SW-4HE Impedance
GRS 12SW-4HE SPL
GRS 12SW-4HE Dimensions
PDF fileDatasheet

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