Get ready to shake things up with the HD Series Subwoofers! These ultra-heavy-duty beauties are built to deliver gut-wrenching, earth-shaking bass that'll have even the most hardcore audiophiles grinning from ear to ear. But beware - the HD Series has enough power to rattle your fillings loose and make your rearview mirrors quiver. Just don't blame us if your windshield ends up in a million pieces (American Bass is not responsible for any accidental property damage caused by excessive bass). Upgrade your sound system with the HD Series and let the bass do the talking!