Citadel Broadcasting bought the station from locally owned Spring Broadcasting (who also owned WFHN "Fun 107" in New Bedford, MA) around the turn of the century. WQGN and WFHN, because they were owned by the same company, shared some of its personalities and station features. Both stations had a "Winners Weekend" where listeners could win anything from concert tickets to free CDs. Contests such as "The Big Money Hi-Lo" (listeners had to guess the correct jackpot amount and were told if their guess was too high or too low) and "The Birthday Game" were also featured on both stations.

WQGN 105.5 has been a CHR station since the mid-1980s. Before that, an automated syndicated pop/rock format, TM "Stereo Rock", was broadcast on the 105.5 frequency. The station's on-air positioner is "True Hit Music." Former slogans include: "Music Power", "The Most Music," "Today's Best Music", "All of Today's Hit Music" and "True Hit Music."

Q105 used to hold several "Bash at the Base" concerts at the nearby Groton Sub Base in Groton, CT. Big artists of the day appeared such as Mýa, Shaggy, LFO, Vitamin-C, and Blaque among others. Since 9/11/01, tighter security restrictions at the Groton Sub Base have prevented the station from hosting concerts there.

Notable past and present personalities of the station include: Kid Valentine, Kevin Palana, Shawn Murphy, Erica Kay, Al Levine, Franco, Danny Wright, Liz Jordan, Tom Timmons, Michael Rock, Rob Walker, Bryan Martinez, Erich Bachman, "Real Deal" Mike Neal, Julie Johnson, Double G, Tim Bourne, Nancy Hall, Carly Robbins, Scotty Rhodes, Johnny Mac & John Stevens.

Present DJ's: Nick Giuliano & Bekah