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 transmitter tower is based in Hamden, Connecticut.The station plays a mainstream rock playlist that goes from Jimi Hendrix to Led Zeppelin to Pearl Jam to now. PLR is a traditional ratings powerhouse in southern Connecticut, but format changes at some Hartford stations have given it more of a statewide audience.