DD Audio 3518 D4

-18″ subwoofer - cast frame - 2 x 4 ohm voicecoil - 3″ voice coil diameter - driver displacement: 6.5 liter - recommended ported enclosure 140-170 liters ( NET ) - power handling 1200 W RMS - peak power handling 4800 watts - x-max: +- 17 mm - xmech: 60 mm - qts: 0,454 - Fs: 29,61 Hz - Vas: 136,487 liters - mounting depth 242 mm - cutout diameter 429 mm.