 The second WZZK AM changed formats in January 2006 and is of May 2017 no longer broadcasting.The most serious and successful challenge to WZZK’s dominance came in 1994, when WZBQ, a station licensed to Jasper that had previously targeted the Tuscaloosa area, moved its studios to Birmingham and relaunched itself as WOWC.The new competitor, by then having the new call letters WDXB, gradually began chipping away at WZZK’s audience, and in 2002 began broadcasting from atop Red Mountain in Birmingham, where most of the market’s FM stations have their broadcast towers located.