Well , I guess my question was really more pointing towards the range of HD radio in relation to the base signal . I ' m guessing it ' s not quite as good because of the generally harder to gather digital signal issue at the edge of signal strength . I was on my way back from Chicago , and lost HD signal generally somewhere between Bloomington and Springfield , IL . and then mysteriously it appeared in St Louis at this one spot . I love the 50 k watt power boost on the long distance AM ' s . Right now Chicago goes full power at 415 pm and even in full daylight 440 miles away I get them loud and clear . It ' s really cool to pick up stations from Denver , Minneapolis , Detroit , Atlanta , Dallas , New Orleans , etc like they were down the street . Farthest skip I ' ve gotten on the FM side is kind of a tossup between a station in North Carolina and a newstalk station out of Baltimore . Both were during the prime skip time . June .