I made 3 examples of bottoms / subs I like as the foundation of my tracks, and no sine to be found anywhere:
http://dl.dropbox.com/u/3913404/fridell_example01.mp3
http://dl.dropbox.com/u/3913404/fridell_example02.mp3
http://dl.dropbox.com/u/3913404/fridell_example03.mp3