Korn are a heavy-rock phenom, just as Black Sabbath were during the ’70s, when their domination seemed secretive. But now, when megasellers summarily get covered from all known media angles, Korn (like Britney Spears) sled through superstardom more easily than Sabbath, who (like Olivia Newton-John) had only the private love of fans. On their sixth album, Korn are ultraconfident, forgoing the blandishments of heavy-rock virtuoso conceptualist Michael Beinhorn, who produced their last album. That confidence has influenced their songs, whose titles — “Right Now,” “I’m Done,” “When Will This End” — foretell the Skinny Puppy–ish onslaughts and assaults that catapult Korn’s hatred. During “Here It Comes Again,” a glimmer of singer-bagpipist Jonathan Davis’s Duran Duran fanhood emerges. But this music prefers crackly, tractor-size riffs.