Run-D.M.C.’s Raising Hell remains the turning point at which hip-hop crashed through mainstream barriers and never left. Anchored by the crossover smash “Walk This Way,” the 1986 blockbuster still sounds like a revolution unfolding in real time. It has everything – hard-rock riffs, turntable scratching, itchy rhythms, hit singles – not the least of which are the trio’s invigorating raps and inseparable chemistry. And now it’s the first rap record afforded audiophile treatment, courtesy of Mobile Fidelity’s simply illin’ analog edition.