Dan Bejar, the idiosyncratic Canadian singer-songwriter who makes music as Destroyer, let loose on his last album, Poison Season, channeling “Born in the USA”–Springsteen via a howling horn section and pounding drums. On his newest album, Ken, he turns back toward a dynamic, mature interpretation of ‘80s soft-rock — full of smoky, monochrome synths, cryptic murmurings and muted sax lines.