The Commerce Department's cautious approach toward power increases was based on the assumption that station transmitters were located in heavily populated areas. However, in May 1925 it recognized that WLW's Harrison and WSAI's Mason, Ohio transmitter sites were both far enough from population centers that they could immediately begin operating as the first two stations in the nation transmitting with the full 5,000 watts. A "Cincinnati Post" writer investigated the effect of WSAI and WLW's May 11 introduction of the use of 5,000 watts, and found that despite claims that their "superpower broadcasting" would eliminate static within 500 miles, it was only "a start in the right direction". Listeners reported that the stations now sounded about twice as strong, and also noted that KDKA in Pittsburgh's 10,000 watts was even better.