XM Radio is broadcasting over 170 digital channels of totally new music, news, sports and children's programming direct to cars and homes via satellite and our extensive repeater network, which supplements the satellite signal to ensure seamless transmission. The channels originate from XM's broadcast center, the world's largest all-digital studio complex in Washington, DC, and uplink to our satellites. These satellites transmit the signal across the entire continental United States. Each satellite provides 18kw of total power making them the two most powerful commercial satellites ever built, providing coast-to-coast coverage. XM Satellite Radio is changing the way people listen to ...