Feel every bass line and kick drum thump, thanks to this 30 cm woofers huge 1800 W peak power output (420 W RMS). The XS NW12002 dimpled pentagonal design reduces distortion levels, so you enjoy cleaner sounding bass even when the volume is turned up. 1800 W peak power output, 420 W RMS Dimpled pentagon design reduces distortion Durable rubber surround Wide 32 Hz 1000 Hz frequency response 4 Ohms impedance.