The Vancouver garage-punk duo of Becky Black (vocals, guitar) and Maya Miller (drums) offers up more filthy riffs, feedback, and ferocious vocals on its fourth full-length. Each album finds The Pack A.D. inching farther from the grimy blues of its first two releases without losing power or punch. Designed for high volume, the songs are stripped-down bursts of angst and attitude that find Miller mercilessly beating her cymbals and Black snarling about broken relationships as she adds thick chords and fuzzy guitar lines to these high-energy rockers. The relatively melodic and dynamic “Seasick” and “Pieces” offer some contrast to the minimalist attack of standouts like “Sirens,” “Rid of Me,” and “Take,” though most of the album fits a similar foot-stomping mold. Unpersons is big, loud, hook-filled fun.