WMUZ (1200 kHz) is a commercial AM radio station licensed to Taylor, Michigan, and serving the Metro Detroit radio market. Owned by Crawford Broadcasting, the station has a Christian talk and teaching format. Religious hosts heard on WMUZ include David Jeremiah, Joyce Meyer, Alistair Begg, Chuck Swindoll and Adrian Rogers. The studios and offices are located near Burt Road and Capitol Avenue in the Weatherby section of Detroit.

By day, WMUZ is powered at 50,000 watts, the maximum for commercial American AM stations. During daytime hours, it uses a four-tower array as part of its directional antenna. Because 1200 AM is a clear-channel frequency reserved for Class A station WOAI in San Antonio, WMUZ reduces power at night to 15,000 watts, using a ten-tower array, to avoid interference. The transmitter is on Middlebelt Road at King Road in Romulus.

In 1956, WCHB signed on as a 1,000-watt daytimer at 1440 AM. It was originally licensed to Inkster, Michigan. The call letters stood for Dr. Wendell Cox and Dr. Haley Bell, who owned and operated the station under the Bell Broadcasting banner.

WCHB was one of the earliest radio station in the United States to be built from the ground up by black owners. It featured an R&B format, and quickly became a visible presence in Detroit's African-American community. Early on, WCHB aimed to be an all-purpose full-service station for the community, featuring not only R&B hits, but also urban gospel music, jazz, talk shows, and even a "Tweeny Time" show for two-to-six-year-olds. By the late 1960s, however, the popularity of the Motown sound, in addition to competition from WJLB (then an AM station at 1400 on the dial, now WDTK) and FM upstart WGPR, led WCHB to adopt a more Top 40-style presentation to the soul music format. In 1960, Bell Broadcasting signed on an FM sister station, WCHD, which later changed its call sign to WJZZ, becoming Detroit's most popular jazz station. (WCHD is now WDMK.)

WCHB experimented with a disco music format for a time during the late 1970s. However, WCHB saw its ratings sink during the 1980s as FM urban contemporary stations like WJLB (which moved its format from the AM to the FM dial in 1980) and WDRQ grabbed much of its audience. The station eventually returned to its roots of being a full-service voice for the African-American community, adding more talk shows, gospel music, news and sports, while reducing its R&B music shows.

Bell Broadcasting moved the WCHB call letters to 1200 kHz in February 1990 as a new AM station for the Metro Detroit area. (AM 1440 became an all-gospel station as WMKM, under different ownership.)

In 1998, Bell Broadcasting sold WCHB and WCHB-FM (formerly WJZZ, later WDTJ and now WDMK) to Radio One, a black-owned broadcasting company. Radio One then set about the process of upgrading WCHB's signal, which involved taking the station off the air for several months in August 1998 to upgrade the equipment. The company purchased WKNX in Frankenmuth (at 1210 AM) and moved it to Kingsley, near Traverse City in northern Michigan (see also WLDR and WWMN), to improve WCHB's signal. Another occurrence which played a role was the nighttime reduction in power of first-adjacent channel WOWO in Fort Wayne, Indiana (at 1190 AM). WOWO also directionalized its nighttime signal towards the west and became a Class B station (formerly a Class A, clear channel with good nighttime coverage of Metro Detroit). That change of the WOWO signal at least partially allowed WCHB to increase nighttime power to 15,000 watts from 700 watts.

WCHB resurfaced in March 1999 with a new 50,000-watt daytime/15,000-watt nighttime signal and with a format of mainly gospel music, with a morning talk show, "Inside Detroit," hosted by outspoken Detroit personality and former WJLB newscaster Mildred Gaddis.