Ground Zero RADIOACTIVE GZRW 12XSPL

2x2Ω

Subwoofer

Nominal diameter12″ / 300 mm
Resonance31.8 Hz
Q factor0.68
Sensitivity83.4 dB
Linear excursion± 18 mm
Program Power1500 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 83.4dB
  • Frequency response 35 - 100Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 31.8Hz
  • Mechanical quality factor QMS 7.03
  • Electrical quality factor QES 0.76
  • Total quality factor QTS 0.68

Large signal parameters

  • Maximum linear excursion (one way) xmax 18mm
  • Maximum excursion before damage xlim 22.5mm
  • Air volume displaced at xmax VD 905cm³
  • Power handling P 1000W
  • Program power Pmax 1500W

Voice Coil

  • Nominal impedance Z 2 x 2Ω
  • DC resistance (in series) RE 3.9Ω
  • Inductance (1kHz, in series) LE 3.38mH
  • VC Diameter 75mm
  • Winding height HVC 35mm
  • Winding material Copper
  • Former material Aluminum

Magnet

  • Force factor (in series) Bl 18.3N/A
  • Motor constant Bl/√RE 9.31N/√W
  • Air gap height HAG 10mm
  • Diameter 170mm
  • Height 40mm

Diaphragm

  • Effective diameter 253mm
  • Effective area SD 503cm²
  • Moving mass MMS 329g
  • Moving mass (without air load) MMD 320g
  • Material Paper

Suspensions

  • Stiffness KMS 13.2N/mm
  • Compliance CMS 76µm/N
  • Equivalent volume to the compliance VAS 27.2L
  • Mechanical resistance RMS 9.35N·s/m
  • Surround material Foam
  • Spider material Polycot

Dimensions

  • Nominal diameter 12
  • 300mm
  • Overall diameter 311mm
  • Baffle cutout diameter 288mm
  • Overall depth 172mm
  • Flange thickness 6mm
  • Mounting depth 166mm
  • Volume occupied by the driver (estimated) 3.9L
  • Net weight 9.0kg
  • Frame material Steel

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