Musically, AM Radio unofficially died in Boston MA when WRKO(AM), (680 kHz on the radio dial), the number one Top 40 AM radio station, flipped to all talk in the early 1980s. We still had WILD(AM), (1090 kHz on the radio dial), the premier Black music AM radio station until about 2006 when it flipped to all talk as well. Funny thing about WILD-AM though is it only broadcast from sunrise to sunset .
Info gathered from bostonradio.org and my limited memory. 
