GRS 5SMP-4

4Ω
8Ω

Woofer

Nominal diameter5.25″ / 145 mm
Resonance62 Hz
Q factor0.54
Sensitivity85.3 dB
Linear excursion± 2 mm
Program power70 W
GRS 5SMP-4 WooferGRS 5SMP-4 WooferGRS 5SMP-4 Woofer
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 85.3dB
  • Frequency response 50 - 2500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 62Hz
  • Mechanical quality factor QMS 4.21
  • Electrical quality factor QES 0.62
  • Total quality factor QTS 0.54

Large signal parameters

  • Maximum linear excursion (one way) xmax 2mm
  • Air volume displaced at xmax VD 16cm³
  • Power handling P 35W
  • Program power Pmax 70W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.7Ω
  • Inductance (1kHz) LE 0.58mH
  • VC Diameter 26mm
  • Former material Aluminum

Magnet

  • Force factor Bl 4.9N/A
  • Motor constant Bl/√RE 2.55N/√W
  • Diameter 100mm

Diaphragm

  • Effective diameter 101mm
  • Effective area SD 80cm²
  • Moving mass (including air load) MMS 10.4g
  • Moving mass MMD 9.8g
  • Material Damped poly cone

Suspensions

  • Stiffness KMS 1.59N/mm
  • Compliance CMS 630µm/N
  • Equivalent volume to the compliance VAS 6L
  • Mechanical resistance RMS 0.96N·s/m
  • Surround material Rubber

Dimensions

  • Nominal diameter 5.25″
  • 145mm
  • Overall diameter 145mm
  • Baffle cutout diameter 117mm
  • Overall depth 70mm
  • Flange thickness 6mm
  • Mounting depth 64mm
  • Volume occupied by the driver (estimated) 0.33L
Impedance
SPL
GRS 5SMP-4 Impedance
GRS 5SMP-4 SPL
GRS 5SMP-4 Dimensions
PDF fileDatasheet

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