GRS 8PR-8

8Ω

Woofer

Nominal diameter8″ / 203 mm
Resonance55 Hz
Q factor0.97
Sensitivity87.4 dB
Linear excursion± 3 mm
Program power130 W
GRS 8PR-8 WooferGRS 8PR-8 WooferGRS 8PR-8 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 87.4dB
  • Frequency response 40 - 5000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 55Hz
  • Mechanical quality factor QMS 4.08
  • Electrical quality factor QES 1.28
  • Total quality factor QTS 0.97

Large signal parameters

  • Maximum linear excursion (one way) xmax 3mm
  • Air volume displaced at xmax VD 63cm³
  • Power handling P 65W
  • Program power Pmax 130W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 7.4Ω
  • Inductance (1kHz) LE 1.1mH
  • VC Diameter 38mm

Magnet

  • Force factor Bl 6.9N/A
  • Motor constant Bl/√RE 2.54N/√W
  • Diameter 100mm
  • Material Ceramic Ferrite

Diaphragm

  • Effective diameter 163mm
  • Effective area SD 210cm²
  • Moving mass (including air load) MMS 23.4g
  • Moving mass MMD 21.2g
  • Material Polypropylene

Suspensions

  • Stiffness KMS 2.78N/mm
  • Compliance CMS 360µm/N
  • Equivalent volume to the compliance VAS 22.3L
  • Mechanical resistance RMS 1.98N·s/m
  • Surround material Butyl Rubber

Dimensions

  • Nominal diameter 8″
  • 203mm
  • Overall diameter 203mm
  • Baffle cutout diameter 193mm
  • Overall depth 87mm
  • Flange thickness 5mm
  • Mounting depth 79mm
  • Volume occupied by the driver (estimated) 0.7L
Impedance
SPL
GRS 8PR-8 Impedance
GRS 8PR-8 SPL
GRS 8PR-8 Dimensions
PDF fileDatasheet

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