Ground Zero GZTW 12F

12″ high quality subwoofer with high-strength, extremely flat IMPP cone12″ high quality flat subwooferKlippel® optimizedIMPP coneRubber surroundResonance free steel basket50 mm / 2″ copper voice coilShallow installation depthPush terminal 12″ subwoofer shallow mount version Power handling (RMS) 350 W recommended amplifier 200-500 W 2″ voice coil wounded of copper wire 2x 2 ohm voice coils fs 35.1 Hz qts 0.526 vas 53.1 liters sensitivity 89 dB / 1W/1m x-max 32 mm IMPP-cone installation diameter 284 mm installation depth 98 mm recommended sealed enclosure 25-40 liters recommended ported enclosure 22 liters ( tuned to 48 Hz ).