KNAC played a wide variety of heavy metal and rock-based music from the late-1960s to 1995, the radio station's last year on the air, including classic rock, hard rock, traditional heavy metal, progressive rock/metal, power metal, glam metal, thrash metal, crossover thrash, death metal, groove metal, alternative metal and grunge. KNAC was also responsible for helping launch the careers of previously low-key metal and hard rock bands, and is often credited for being the first radio station to promote new bands before their large-scale success, including Metallica, Guns N' Roses, Bon Jovi, Megadeth, Skid Row, Metal Church, Pantera, Alice in Chains, Soundgarden, Stone Temple Pilots, White Zombie, Poison, Testament, Stryper, Lizzy Borden and Armored Saint.