When Dan Fenton and his bandmates pondered where to pursue rock stardom post-college, they must’ve been at least a little swayed by the home addresses of the Kings of Leon. An added incentive: They’d already forged a connection with a Nashville production team from the Christian rock world. That latter affiliation might explain why the band now known as Feedback Revival seems to have so many more songs that wrestle with the consequences of giving in to temptation than songs that flaunt rock ’n’ roll hedonism. That doesn’t mean they play nice — Fenton’s a raw-throated yowler, and the guitar riffs are industrial strength. Blackfoot Gypsies make just as much noise with a two-man lineup. Singer-guitarist Matthew Paige and drummer Zack Murphy specialize in seriously overdriven blues-rock and the occasional wild-eyed, down-home instrumental. You can rarely tell what words are coming out of Paige’s mouth on their debut EP, but it doesn’t much matter. They (and their guest bassist/keyboardist) tear into the songs with the sort of abandon that can only come from players as young and riled as the Woodstock crowd was then, as opposed to now. The rest of the lineup represents other corners of the Southern musical landscape: string band Hardin Draw, the Long Gone Darlings (whose alt-country is more indebted to indie than alt-rock) and first-rate country-folk troubadour Sam Lewis.