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- KBOI (670 kHz) is a commercial AM radio station in the western United States, located in Boise, Idaho. It is owned by Cumulus Media and airs a news/talk radio format. Studios and offices are on Bannock Street in Downtown Boise, while its transmitter is located at a six-tower array southwest of the city. KBOI is Idaho's most powerful AM station, broadcasting with 50,000 watts around the clock. During the day, a single non-directional antenna beams the station's full power to Southwestern Idaho and Eastern Oregon. At night, power is fed to all six towers in a directional pattern to avoid interfering with WSCR in Chicago, the Class A clear-channel station on 670 AM. Even though it must direct its signal north-south as a result, KBOI can still be heard with across much of the western half of North America at night with a good radio, but is strongest in the Pacific Northwest. Because of this, KBOI is Idaho's designated primary entry point station for the Emergency Alert System. KBOI is licensed by the FCC to broadcast in the HD Radio hybrid digital format, although it currently does not have HD turned on. (en)