DD Audio Redline 718d D4

-18? subwoofer - cast frame - 2 x 4 ohm voicecoil - 3? voice coil diameter - recommended ported enclosure 169-226 liters ( NET ) - power handling 1200 W RMS - peak power handling 3600 watts - x-max: +- 16 mm - xmech: 80 mm - qts: 0,5233 - Fs: 26,92 Hz - Vas: 170,4 liters - mounting depth 267 mm - cutout diameter 423 mm.