Rock ‘n’ roll is often hard to define, or even to find, in these fractured musical times. But to paraphrase an old saying, you know it when you hear it. And you always hear it with the Wallflowers. For the past 30 years, the Jakob Dylan-led act has stood as one of rock’s most dynamic and purposeful bands – a unit dedicated to and continually honing a sound that meshes timeless songwriting and storytelling with a hard-hitting and decidedly modern musical attack. That signature style has been present through the decades, baked into the grooves of smash hits like 1996’s Bringing Down the Horse as well as more recent and exploratory fare like 2012’s Glad All Over.