The station, which started as WNHC-FM, has a history as a pioneer in the album oriented rock format which it has closely identified with since the format's inception in the early 1970s.
The physical location of the station has also changed as the studios are now co-located with other radio stations in Milford, Connecticut. Previously, the studios were located in Hamden and prior to that the offices and studios were on Chapel Street in New Haven.
The station plays a mainstream rock playlist that goes from Jimi Hendrix to Led Zeppelin to Pearl Jam to now. They also have a weekday morning show called Chaz & AJ from 5:30-10:00 A.M. Midday is hosted by The Wigmaster from 10 A.M. to 2 P.M., afternoon drive is hosted by "Your Ol' Buddy Lappy" Mike Lapitino from 2 P.M. to 8 P.M., nights are hosted by Allan Lamberti from 8 P.M. to 12 Midnight and overnights are hosted by Ed from 12 midnight-5:30 A.M. On Fridays at 5:20 is the "Wig Out" in which the host, the Wig Master, gives his points of view on current events. It traditionally ends with the Wig Master saying "You gotta gotta gotta gotta gotta...(etc.) wig out!"
PLR is a traditional ratings powerhouse in southern Connecticut, but format changes at some Hartford stations have given it more of a statewide audience.
Locally famous WPLR alumni include the late Stoneman (Joe Demaio), RJ Allison, Ed Sabatino (Eddie Sab), Travis James, Bob Nary, Bob Dark, Marcia Simon, Joe from Chicago, Bruce Manke, The Lich, Irv Goldfarb, Eddie Haskell, Brian Smith, Bruce Barber, Gordon Weingarth, Eddie Wazoo, Tom "Bassman" Bass, Pam Landry, Billy Winn, Marylee, Bob London, Mark Kaplowe, Joan McCarthy, Lynne Taylor, Lance Hollywood, Doc Rock, Country Paul Payton, Trapper Dave, Ron O, Pete Z, Anthony Griek, Mike Prodoti and Brett Perry.