-18″ subwoofer – cast frame – 2 x 2 ohm voicecoil – magnet weight 31,7 kg – 4″ voice coil diameter – driver displacement: 9,4 liter – recommended ported enclosure 140-170 liters ( NET ) – power handling 2500 W RMS – peak power handling 10 000 watts – x-max: +- 22 mm – xmech: 100 mm – qts: 0,49 – Fs: 36,09 Hz – Vas: 85,15 liters – mounting depth 267 mm – cutout diameter 429 mm.