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KSOQ was previously assigned the call letters KFSD while owned by the Astor Broadcast Group, who chose a format of classical music acquired from Lotus Communications in 1997, which in 2001 switched to an alternative rock format as Premium 92/1, still with the KFSD call letters.
Finally, in September 1997, when the station was bought by its current owner, Greater Media, an executive from that company announced that the station's classical recordings would be sold to WRTI (Temple University's radio station); the stated rationale was that classical music is best presented in a non-commercial format.