Prepare your eardrums. From Sept. 17-20, the annual Louder Than Life Festival is going down at Louisville, KY’s Kentucky Exposition Center. Per usual, the four-day extravaganza is bringing in the biggest names in heavy metal, hard rock, emo, punk and more to headline. Sitting atop this year’s lineup are legendary standbys Iron Maiden , alt-icons Tool , ’00s heroes My Chemical Romance , nü metal party-starters Limp Bizkit and the always-unrelenting Pantera . They’ll be joined by Pierce The Veil ,