

Ground Zero GZTW 12 mk.2
Autohifi subwooferManufacturer parameters
- Diameter: 12" (30cm)
- Power (W): 400
- Impedance (Ohm): 4
- Sensitivity (db/1W): 86,7
- Qts: 0,48
- Price: 65€
- Diaphragm: Polypropylene
- Basket: sheet steel
- Magnet: single
- Fs = 21.72 Hz (22,5Hz according to GZ)
- Re = 3.90 ohms[dc]
- Le = 3577.93 uH
- Qt = 0.48
- Qes = 0.54
- Qms = 5.01
- Mms = 92.26 grams
- Cms = 0.000582 m/N
- Vas = 181.72 liters (148,6l according to GZ)
- Sd= 471.44 cm^2
- Bl = 9.565252 Tm
- ETA = 0.33 %
- Lp(2.83V/1m) = 90.46 dB (87dB/1W/1m)
- gamma = 103,7
- EBP=40 Hz (sealed)
Recommended enclosure:
SQ - Closed 30l
SPL - Bassreflex 50l @ 41Hz (port area at least 110cm2)
Interesting cheap woofer, good for some SPL-ing in small for a small amount of money, but also for a good SQ in a sealed enclosure. It has vent holes under centering spider, which is an interesting feature in this price range. For this amount of money not bad at all.