KJAC is a non-commercial public radio station located in Timnath, Colorado, broadcasting to the Fort Collins-Denver, Colorado area on 105.5 FM.
KJAC started as a construction permit with the call letters KLWG, in 1987. The station officially signed on in 1989 with the call sign KIMX.[2] The KIMX call sign was subsequently moved to Wyoming, jumping around on various frequencies. In late 2003, as the station was using the KKHI-FM call sign, it was acquired by NRC Broadcasting, which successfully managed to launch the innovative Jack FM format a few months later.[3]
KJAC previously aired an adult hits music format branded as "Jack FM". For a short time, it was simulcast on AM radio, 870 KJMP, licensed to nearby Pierce, Colorado.[4][5] KJMP later broke the simulcast, and aired a sports format from ESPN Radio, which then became an oldies station known as "The Big 87". That station finally settled on hip-hop.[6]
Jack FM Denver was the first Jack radio station in the United States. Denver's Jack employed a comedic irreverence in its presentation, and a style of music endemic to the varied tastes of Colorado's front-range listeners. Each Jack station is a little different, and KJAC's attention to the style of Colorado gave the station a unique and local feel.
On September 1, 2008, NRC Broadcasting converted KCUV, into a rebroadcast of the current Jack FM feed, utilizing the 102.3 FM frequency to serve the broader Denver metropolitan area, while retaining the current 105.5 FM frequency that serves Northern Colorado. Jingles broadcast over the air often interchanged 102.3 FM and 105.5 FM, depending on whether the focus was on Denver, or the station in general.[7]
On July 15, 2010, it was announced that KJAC would stick with the current format while sister station KDSP flipped to sports on July 19, 2010.[8]
In 2011, 105.5 Jack FM dropped the local version and started using the Dial Global StorQ version that smaller market Jacks use.
On September 7, 2012, KJAC started stunting with classic country as "Bob FM", which led to a flip to ESPN Radio.[9]
2015 年 12 月 7 日、フロント レンジ スポーツ ネットワークスは KJAC をコミュニティ ラジオ フォー ノーザン コロラドに売却し、コミュニティ ラジオ フォー ノーザン コロラドは 2016 年 2 月 29 日に同局を非商業的なアダルト アルバム オルタナティブ フォーマットに変更し、メイン局のKUNC /フォート コリンズ (コロラド州)がニュース / トーク番組に専念できるようにした。KJAC が 2016 年 1 月 3 日に番組を終了した後、ESPN ラジオは、姉妹局のKKFNが 1 月 4 日から深夜番組を追加 (およびFox Sports Radio を番組表から削除)して、以前のデンバー系列局KEPN にフルタイムで復帰した。 [ 10 ]
2016年2月29日、アダルトアルバムオルタナティブフォーマットが「ザ・コロラド・サウンド」として正式に開始されました。[ 11 ]コロラド北部コミュニティラジオへの売却は2016年4月5日に300万ドルで完了しました。
2017年7月14日、KJACは中継局K232AC 94.3 FMブレッケンリッジでの同時放送を開始した。[ 12 ]