The Polk Primus HTS SUB 12 is much like the HTS SUB 10 only bigger with higher power & even deeper bass. It can delve down to lows of 22 Hz & at its centre is a long-throw Dynamic Balance 12-inch driver delivering accurate sound with less distortion. For a further boost to sound this subwoofer comes equipped with patented Power Port technology; an innovative feature ensuring deep extended bass impact with simultaneously minimised turbulence distortion & port noise. A state-of-the-art 400W (peak power) Class D amplifier guarantees high-quality audio that is clean & clear. Together these features bring about a sound that is as powerful as it is precise.