Ground Zero HYDROGEN GZHW 25XSPL-D1

D1
D2

Subwoofer

Nominal diameter10″ / 250 mm
Resonance40.3 Hz
Q factor0.52
Sensitivity83.4 dB
Linear excursion± 22.5 mm
Program Power2500 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

Thiele & Small parameters

  • Resonance frequency (free air) fS 40.3Hz
  • Mechanical quality factor QMS 8.15
  • Electrical quality factor QES 0.55
  • Total quality factor QTS 0.52

Large signal parameters

  • Maximum linear excursion (one way) xmax 22.5mm
  • Air volume displaced at xmax VD 833cm³
  • Power handling P 1200W
  • Program power Pmax 2500W

Voice Coil

  • Nominal impedance Z 2 x 1Ω
  • DC resistance (in series) RE 1.9Ω
  • Inductance (1kHz, in series, estimated) LE 1.93mH
  • VC Diameter 63mm
  • Winding material Copper

Magnet

  • Force factor (in series) Bl 16.5N/A
  • Motor constant Bl/√RE 11.9N/√W

Diaphragm

  • Effective diameter 217mm
  • Effective area SD 370cm²
  • Moving mass MMS 307g
  • Moving mass (without air load) MMD 302g
  • Material Reinforced paper

Suspensions

  • Stiffness KMS 19.6N/mm
  • Compliance CMS 51µm/N
  • Equivalent volume to the compliance VAS 9.91L
  • Mechanical resistance RMS 9.54N·s/m

Dimensions

  • Nominal diameter 10
  • 250mm
  • Overall diameter 274mm
  • Baffle cutout diameter 238mm
  • Mounting depth 178mm
  • Volume occupied by the driver (estimated) 1.8L
  • Frame material Aluminium cast

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