Ground Zero GZNW 12XSPL 428.12 EUR Available BUY Article Number: GZNW 12XSPL Share Information Reviews 30 cm / 12″ Subwoofer, 4500 W SPL Power 2 x 1 ohm, 75 mm / 3″ CCA voice coil, Reinforced paper cone, 4x spider Fs 38.1 Hz, Qts 0.41, SPL 92 dB.