97.5 Hot 103.9 is an Adult Top 40 radio station in the Phoenix, Arizona area that is owned by Riviera Broadcasting, LLC.For many years, KMVA operated as KVNA-FM, an Adult Contemporary-formatted radio station based in Flagstaff. Marathon Media, a company known for taking rural stations and moving them closer to larger metropolitan areas in order to sell them for a larger amount, purchased the station in 2003, and got approval to move the station to a site between Phoenix and Prescott to cover the Phoenix metropolitan area.