GRS K-33-4

4Ω

Woofer

Nominal diameter15″ / 384 mm
Resonance32.2 Hz
Q factor0.52
Sensitivity93.3 dB
Linear excursion± 8.3 mm
Program power400 W
GRS K-33-4 WooferGRS K-33-4 WooferGRS K-33-4 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 93.3dB
  • Frequency response 30 - 2000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 32.2Hz
  • Mechanical quality factor QMS 12.60
  • Electrical quality factor QES 0.55
  • Total quality factor QTS 0.52

Large signal parameters

  • Maximum linear excursion (one way) xmax 8.3mm
  • Air volume displaced at xmax VD 710cm³
  • Power handling P 200W
  • Program power Pmax 400W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.5Ω
  • Inductance (1kHz) LE 1.13mH
  • VC Diameter 50.8mm

Magnet

  • Force factor Bl 10.9N/A
  • Motor constant Bl/√RE 5.83N/√W
  • Diameter 156mm

Diaphragm

  • Effective diameter 330mm
  • Effective area SD 855cm²
  • Moving mass (including air load) MMS 91.6g
  • Moving mass MMD 74.3g
  • Material Paper

Suspensions

  • Stiffness KMS 3.7N/mm
  • Compliance CMS 270µm/N
  • Equivalent volume to the compliance VAS 274L
  • Mechanical resistance RMS 1.47N·s/m
  • Surround material Triple-roll

Dimensions

  • Nominal diameter 15″
  • 384mm
  • Overall diameter 384mm
  • Baffle cutout diameter 372mm
  • Overall depth 160mm
  • Flange thickness 12mm
  • Mounting depth 148mm
  • Volume occupied by the driver (estimated) 3.7L
Impedance
SPL
GRS K-33-4 Impedance
GRS K-33-4 SPL
GRS K-33-4 Dimensions
PDF fileDatasheet

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