sentences:  Following backlash from listeners, by the fall of 1993, WLAV put the alternative format on 1340 WLAV-AM (then calling it "1340 Underground", where it ran for approximately 2 more years until a sports format replaced it).At the same time, they switched the FM signal back to a more classic rock-driven format.They continued refining the format during the 1990s, honing it towards classic rock music from the 1960s to the 1980s, to renewed success in the ratings.