GRS RSB901-1

1Ω

Full-range

Nominal diameter4.5″ / 114 mm
Resonance84.1 Hz
Q factor0.37
Sensitivity91 dB
Linear excursion± 2.5 mm
Program power60 W
GRS RSB901-1 Full-rangeGRS RSB901-1 Full-rangeGRS RSB901-1 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 91dB
  • Frequency response 83 - 15000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 84.1Hz
  • Mechanical quality factor QMS 2.41
  • Electrical quality factor QES 0.43
  • Total quality factor QTS 0.37

Large signal parameters

  • Maximum linear excursion (one way) xmax 2.5mm
  • Air volume displaced at xmax VD 19cm³
  • Power handling P 30W
  • Program power Pmax 60W

Voice Coil

  • Nominal impedance Z 1Ω
  • DC resistance RE 0.7Ω
  • Inductance (1kHz) LE 0.08mH
  • VC Diameter 25.4mm

Magnet

  • Force factor Bl 1.91N/A
  • Motor constant Bl/√RE 2.28N/√W
  • Diameter 85mm
  • Height 5mm

Diaphragm

  • Effective diameter 98mm
  • Effective area SD 75.6cm²
  • Moving mass (including air load) MMS 4.27g
  • Moving mass MMD 3.8g

Suspensions

  • Stiffness KMS 1.19N/mm
  • Compliance CMS 840µm/N
  • Equivalent volume to the compliance VAS 6.8L
  • Mechanical resistance RMS 0.94N·s/m

Dimensions

  • Nominal diameter 4.5″
  • 114mm
  • Overall diameter 126mm
  • Overall depth 69mm
  • Flange thickness 7mm
  • Mounting depth 62mm
  • Volume occupied by the driver (estimated) 0.27L
Impedance
SPL
GRS RSB901-1 Impedance
GRS RSB901-1 SPL
GRS RSB901-1 Dimensions
PDF fileDatasheet

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