GRS 4AS-4

4Ω

Full-range

Nominal diameter4″ / 103 mm
Resonance131 Hz
Q factor1.48
Sensitivity87.8 dB
Program power50 W
GRS 4AS-4 Full-rangeGRS 4AS-4 Full-rangeGRS 4AS-4 Full-range
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 87.8dB
  • Frequency response 85 - 11000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 131Hz
  • Mechanical quality factor QMS 6.09
  • Electrical quality factor QES 1.95
  • Total quality factor QTS 1.48

Large signal parameters

  • Power handling P 25W
  • Program power Pmax 50W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.6Ω
  • Inductance (1kHz) LE 0.3mH

Magnet

  • Force factor Bl 2.6N/A
  • Motor constant Bl/√RE 1.37N/√W
  • Diameter 70mm

Diaphragm

  • Effective diameter 84mm
  • Effective area SD 55.1cm²
  • Moving mass (including air load) MMS 4.5g
  • Moving mass MMD 4.2g

Suspensions

  • Stiffness KMS 3.03N/mm
  • Compliance CMS 330µm/N
  • Equivalent volume to the compliance VAS 1.4L
  • Mechanical resistance RMS 0.61N·s/m

Dimensions

  • Nominal diameter 4″
  • 103mm
  • Overall diameter 103mm
  • Baffle cutout diameter 102mm
  • Overall depth 47mm
  • Flange thickness 3mm
  • Mounting depth 44mm
  • Volume occupied by the driver (estimated) 0.12L
Impedance
SPL
GRS 4AS-4 Impedance
GRS 4AS-4 SPL
GRS 4AS-4 Dimensions
PDF fileDatasheet

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