Learning from the 808 and 909 bassdrum boom.
Here's an interesting picture: It's the 808 bassdrum boom.
http://farm5.static.flickr.com/4125/...4810e87070.jpg
The classic 808 BD sounds and feels like like crazy low bass but in fact it's only down to 45Hz with most of the energy centered around 50 - 75Hz. Not as hard to reproduce as you might think, even with moderately cheapo speakers. Which is probably why it's so popular a sound to use and riff from!
Moral: Concentrate your bass energy in the 50Hz-75Hz range and you'll sound golden on most soundsystems.