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Broadcast areaGreater Pittsburgh
Frequency105.9 MHz (HD Radio)
Branding105.9 The X
FormatAlternative rock
AffiliationsCompass Media Networks
Premiere Networks
Pittsburgh Penguins Radio Network
First air date
January 1, 1961 (as WAZZ)
Former call signs
WAMO-FM (1948–1996)
Technical information
Facility ID60153
ERP15,500 watts
HAAT272 meters (892 ft)
WebcastListen Live

WXDX-FM (105.9 MHz) is a commercial radio station that is located in Pittsburgh, Pennsylvania. Known as 105.9 The X, it airs an alternative rock radio format and is owned by iHeartMedia. The studios and offices are located in Foster Plaza on Holiday Drive in Green Tree, Pennsylvania, but use a Pittsburgh postal address.[1] WXDX is the flagship radio station of the Pittsburgh Penguins hockey team.

WXDX-FM has an effective radiated power (ERP) of 15,500 watts. Its transmitter is located off Swanson Street in Pittsburgh's North Side, on a tower shared with KDKA-TV and other FM stations.[2] WXDX-FM broadcast using HD Radio technology.


WXDX's HD Radio Channels on a SPARC Radio with PSD.

On January 1, 1961, the station signed on as WAZZ and later as WAMO-FM.[3] At first, it was powered at only 4,500 watts but it later had the most powerful FM signal coverage in Western Pennsylvania, broadcasting at 72,000 watts. It initially simulcast the same programming as its AM sister station, WAMO (now WAOB). WAMO-AM-FM served the Pittsburgh African-American community with R&B and soul music, as well as Black talk and news programming on weekdays, and religious shows on Sundays.

In the later 1960s, the FM station began separate programming, specializing in Urban contemporary music, with WAMO-AM-FM sometimes simulcasting on weekends. Over the years, the station was branded as Hot 106 WAMO.

It also had various formats during its later years, which also included Disco music and Rhythmic Contemporary or "CHUrban".[4]

On April 10, 1996, at 3 p.m., WAMO-FM swapped frequencies with WXDX-FM, with the urban format moving to 106.7 FM, while WXDX's alternative rock format moved to the more powerful 105.9 FM frequency.

WXDX-FM was one of six stations owned by Clear Channel Communications (now iHeartMedia) that dropped The Howard Stern Show in February 2004 (however, Stern would show up on WRKZ later that year). Howard began airing on WXDX in November 1995 (when it was still on 106.7 FM).

Since 2008, WXDX-FM has served as the home for sports talk host Mark Madden.

Station staff

Past personalities


WXDX broadcasts using HD Radio technology. It had programming on its HD-2 digital subchannel beginning in 2006, launching a format focusing on Adult Album Alternative (Triple A) music.

In May 2009, as part of its renewal of Pittsburgh Penguins radio rights, WXDX and the Penguins announced that the HD2 subchannel would become a 24-hour channel devoted to Penguins coverage, billed as "Pittsburgh Penguins Radio." It launched on October 1, 2009, with local and nationally-originated Penguins and hockey coverage (including "NHL Live" and league commissioner Gary Bettman's weekly "NHL Hour"), rebroadcasts of classic Penguins games, and game broadcasts of the team's top farm club in Wilkes-Barre/Scranton. The move made the Penguins the second North American professional sports team with their own terrestrial radio channel (after the NFL's Dallas Cowboys and their HD2 relationship with KRLD-FM).[10]

In the fall of 2015, WXDX-HD2 dropped Penguins Radio 24/7 with music WXDX normally plays on their station (but still simulcast Penguins games) until late March 2016 when iHeart2000s began airing. That programming later moved over by WKST-HD2, and was replaced with Pride Radio, an LGBTQ service offered by iHeartRadio.

As of early 2020, WXDX is no longer broadcasting an HD2 subchannel.


  1. ^
  2. ^
  3. ^ Information from Broadcasting Yearbook 1961-1962 page B-145
  4. ^ "from". Archived from the original on 2013-02-01. Retrieved 2013-02-01.
  5. ^ "The X changes things around". Retrieved 22 October 2014.
  6. ^ "Benz New England bound". Retrieved 22 October 2014.
  7. ^ "WLTJ names Joanna Campbell for middays, Debbie Wilde for nights". Retrieved 2015-01-15.
  8. ^ "WAMO and X Play Hide-and-Seek with Listeners Today". Pittsburgh Post-Gazette. John Robinson Block. April 10, 1996. WXDX is shepherding in this new stage of growth with a revamped on-air lineup, bringing Max Logan over from WDVE to host afternoon drive...
  9. ^ "Russ 'Whip' Rose Departs 105.9 The X". RadioInsight. Retrieved 2022-04-20.
  10. ^ Taylor, Tom (May 11, 2009). "The NHL Pittsburgh Penguins get a full-time HD-2 channel from "The X."". Taylor on Radio-Info. Archived from the original on May 25, 2011. Retrieved December 29, 2010.

40°29′38″N 80°01′08″W / 40.4940°N 80.0190°W / 40.4940; -80.0190