Most newer main stream receivers have lousy tuners these days. I am a Marantz dealer but we also sell high end and the best tuners are still old ones from the 60's. The best thing is to get a real FM antenna in your attic or on your roof. This is a way to make a huge difference for little money and some labor on your part. There is nothing you can do about AM except to tie the antenna hook up for AM into the ground of your house so you are using all the copper wire in your entire house as an antenna. This will also have more noise too but will help you pick up fringe stations.