Ground Zero GZTW 30T

Autohifi subwoofer

Manufacturer parameters
  • Diameter: 12" (30cm)
  • Power (W): 400
  • Impedance (Ohm): 4
  • Sensitivity (db/1W): 90,2
  • Qts: 0,44
  • Price:

  • Diaphragm: polypropylene
  • Basket: sheet steel
  • Magnet: single
Measured parameters
  • Fs = 27.66 Hz
  • Re = 3.40 ohms[dc]
  • Le = 2337.85 uH
  • Qt = 0.40
  • Qes = 0.44
  • Qms = 5.06
  • Mms = 111.9 grams
  • Rms = 3.85 kg/s
  • Cms = 0.000296 m/N
  • Vas = 85.08 liters
  • Sd= 452.39 cm^2
  • Bl = 12.28 Tm
  • ETA = 0.39 %
  • Lp(2.83V/1m) = 91.78 dB (cca. 89dB/1W/1m)
  • gamma = 110


As the 10" version, it's an average woofer.