Ground Zero URANIUM GZUW 8SQ-D2

2x2Ω

Subwoofer

Nominal diameter8″ / 200 mm
Resonance56.9 Hz
Q factor0.69
Sensitivity83.5 dB
Linear excursion± 10 mm
Program Power600 W
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 83.5dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 56.9Hz
  • Mechanical quality factor QMS 11.92
  • Electrical quality factor QES 0.74
  • Total quality factor QTS 0.69

Large signal parameters

  • Maximum linear excursion (one way) xmax 10mm
  • Air volume displaced at xmax VD 201cm³
  • Power handling P 300W
  • Program power Pmax 600W

Voice Coil

  • Nominal impedance Z 2 x 2Ω
  • DC resistance (in series) RE 4.1Ω
  • Inductance (1kHz, in series) LE 1.57mH
  • VC Diameter 50mm
  • Winding material Copper

Magnet

  • Force factor (in series) Bl 13.6N/A
  • Motor constant Bl/√RE 6.72N/√W

Diaphragm

  • Effective diameter 160mm
  • Effective area SD 201cm²
  • Moving mass MMS 92.9g
  • Moving mass (without air load) MMD 90.7g
  • Material Paper

Suspensions

  • Stiffness KMS 11.9N/mm
  • Compliance CMS 84µm/N
  • Equivalent volume to the compliance VAS 4.8L
  • Mechanical resistance RMS 2.79N·s/m
  • Spider material Polycot

Dimensions

  • Nominal diameter 8
  • 200mm
  • Overall diameter 215mm
  • Baffle cutout diameter 181mm
  • Mounting depth 108mm
  • Volume occupied by the driver (estimated) 0.99L
  • Frame material Aluminium cast

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