Ground Zero GZTW 25T

Autohifi subwoofer

Manufacturer parameters

• Diameter: 10" (25cm)
• Power (W): 300
• Impedance (Ohm): 4
• Sensitivity (db/1W): 86,2
• Qts: ?
• Price: 80€

• Diaphragm: polypropylene
• Basket: sheet steel
• Magnet: single

Measured parameters

• Fs = 32.17 Hz
• Re = 3.40 ohms[dc]
• Le = 2.4 mH
• Qt = 0.39
• Qes = 0.42
• Qms = 5.4
• Mms = 132.61 grams
• Rms = 4.96 kg/s
• Cms = 0.000185 m/N
• Vas = 25.58 liters
• Sd= 314.16 cm^2
• Bl = 14.76 Tm
• ETA = 0.2 %
• Lp(2.83V/1m) = 88.74 dB (86dB/1W/1m)
• gamma = 111.3
• EBP=76 Hz (bassreflex/sealed)

Average woofer with average parameters. Suitable for both bass-reflex and sealed enclosure, doesn't need a lot of enclosure volume to work with.