I find it rock-hard to master anything in the bass department cos i've got dodgy hifi speakers, I'm hoping when i get my tracks mastered then I'll be able to make it perfect.

Also at the moment i'm making a vst plug-in and that will have a cut-off frequency of 30Hz (needs to be specified), so maybe quite a few digital synths cut off around this point. Looking at what Ze says, it doesnt look like even clubs reproduce frequencies below 40, but it's always nice to feel that bass.