Ground Zero HYDROGEN GZHW 30XSPL-D2

D1
D2

Subwoofer

Nominal diameter12″ / 300 mm
Resonance42.4 Hz
Q factor0.60
Sensitivity85.8 dB
Linear excursion± 22.5 mm
Program Power3000 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 85.8dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 42.4Hz
  • Mechanical quality factor QMS 6.86
  • Electrical quality factor QES 0.65
  • Total quality factor QTS 0.60

Large signal parameters

  • Maximum linear excursion (one way) xmax 22.5mm
  • Air volume displaced at xmax VD 1171cm³
  • Power handling P 1500W
  • Program power Pmax 3000W

Voice Coil

  • Nominal impedance Z 2 x 2Ω
  • DC resistance (in series) RE 3.8Ω
  • Inductance (1kHz, in series, estimated) LE 3.92mH
  • VC Diameter 75mm
  • Winding material Copper

Magnet

  • Force factor (in series) Bl 22.4N/A
  • Motor constant Bl/√RE 11.5N/√W

Diaphragm

  • Effective diameter 257mm
  • Effective area SD 520cm²
  • Moving mass MMS 320g
  • Moving mass (without air load) MMD 311g
  • Material Reinforced paper

Suspensions

  • Stiffness KMS 22.7N/mm
  • Compliance CMS 44µm/N
  • Equivalent volume to the compliance VAS 16.9L
  • Mechanical resistance RMS 12.4N·s/m

Dimensions

  • Nominal diameter 12
  • 300mm
  • Overall diameter 315mm
  • Baffle cutout diameter 284mm
  • Mounting depth 198mm
  • Volume occupied by the driver (estimated) 2.6L
  • Frame material Aluminium cast

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