There's easily something wrong with them then
imo.
The Aego M's are widely regarded as probably the best computer speakers you can get for under £100 and although i've not heard any i know many that have them and swear by them.
How do you mean there's no bass on them ? The Aego M's aren't like your "standard" Logitech or Creative speakers which are designed for games and films in mind, the Aego's are more like Studio Monitor speakers which aim to reproduce music accurately and more detailed. It could just be that you're used to the X530 sound which is definitely more bass quantity orientated (as opposed to quality), as such your ears haven't adjusted to the more "refined" sound of the Aego's.
Also when you put your head/hand up to the subwoofer, can you feel it moving ? Can you hear the bass then ?