DD Audio 9918B ESP D1

-18? subwoofer - cast frame - 2 x 1 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.