WBMX

WBMX (104.1 FM) is a radio station in Boston, Massachusetts, United States, serving Greater Boston with a hot adult contemporary format. The format started at 98.5 FM on February 9, 1991, and moved to 104.1 FM, replacing WBCN on August 12, 2009, to allow for the launch of WBZ-FM at 98.5 the next day. Its studios are located in Brighton, and its transmitter is on the upper FM mast of the Prudential Tower in Downtown Boston.

The 104.1 MHz facility went on the air in 1958 as WBCN. A classical music station in its first ten years on the air, beginning in 1968, WBCN featured a rock format for 41 years. Known as "The Rock of Boston", WBCN became a legend in the rock music industry for breaking many bands, most notably U2. WBCN was a modern rock/active rock station that mixed music that has been popular in the modern rock, alternative rock and classic rock genres. WBCN switched to digital-only on August 12, 2009, with two digital-only automated streams: one on the HD2 channel of WBZ-FM continuing the modern rock format and the other known as Free Form BCN, airing an eclectic mix of rock, related genres, and new music - essentially the WBCN of 1968 to 1988, brought into the 21st century. Free Form BCN continued on the air until January 2016. The station's battle of the bands' competition, the Rock 'n' Roll Rumble, survived the station's demise. WBCN's local music specialty show, Boston Emissions—along with The Rumble—moved to then-sister station WZLX, now owned by iHeartMedia, in 2009. Boston DJ Anngelle Wood remains the host and music director of both the radio show and The Rumble—these are the last remaining ties to the original 104.1 WBCN programming.

WBCN was replaced on the 104.1 MHz facility by the Mix brand, hot adult contemporary format, and WBMX call sign that had debuted at 98.5 MHz in 1991. From 2017 to 2026, the station operated under the call sign WWBX, allowing its sister station in Chicago to use WBMX.