The PLW215 II will help you to re-live the air-bending effect of Mother Natures own subwoofer within your listening room. Twin 15\" C-CAM drivers triple-suspended for a full 4cm of excursion and individually powered by DSP-controlled amplifiers will deliver clean frequencies down to 16Hz. At this level bass arrives with a percussive impact that you feel from head to toe seamlessly extending even the PL500 II to deliver breath-taking audio resolution beyond the limits of your audible range but with a physical dimension that absorbs the senses. Put simply its the sound of nature vividly re-created.