Better AM reception.... any ideas?

From time to time I want to just put a ball game on the radio in my listening room. I've an Anthem AVM20 with a built in AM/FM tuner. I use the 'loop' antenna supplied with it and its mounted on the back of the cabinet that holds the other gear - two 4 channel amps, sat receiver, dvd, cd, a center speaker and a Sony LCD rear projection T.V. Any ideas for better reception? There is always that AM static type noise in the background, ok on strong stations and much more noticible on others. I live in Miami but not on the fringe. I figured I ask here... someone always seems to know! Thanks