- With a 150 W Class-D amp, this Kanto Audio subwoofer gives plenty of oomph without hogging space - Tweak the volume, adjust the cut-off, and fine-tune the sound - it's got all the controls on its back panel - The rubber feet keep it steady, so your music stays safe from those pesky vibrations - Built from acoustic-grade MDF, it cuts down on resonance for proper, smooth bass response