There was a dearth of fresh voices coming from the once-dominate region of Southern California, when San Diego’s Mitchy Slick announced his arrival on the national scene with the 2006 single “Bass Chasers.” An ear-numbing ode to the splendor of a good subwoofer, “Bass Chasers” is definitive West Coast hip-hop — brawny and bottom-heavy — but it sounded nothing like the gonzo hyphy of the Bay Area, or Los Angeles’ patented G-funk. Well-stocked with a barrage of throttling beats and Mitchy’s own battering ram raps, Urban Survival Syndrome is a consummate slab of menacing, stylish gangsta rap. Outlining his motives on “The Coldest Nigga Out,” Mitchy rhymes about the streets with the guts of someone who lives it daily: “Reality rhymin’ ‘bout casualties climbin’ / Like my baby rellie Marisha dyin’ / Innocently over senseless ridin’ / I’m the coldest so I keep survivin’ / Through a dozen gang feuds and countless indictments… You do it so the hoes will jock you / I’m doin’ it so the homies on the yard’ll have something to bop to.” Rap fans forever waiting on Dr. Dre and Ice Cube to reclaim their past glories would do well to head south to San Diego, where Mitchy Slick has swiftly taken up the gangsta rap gauntlet.