Without mentioning your equipment or room setup this is like throwing darts at a board, so let us know what you've got if you can.
That said, cables can help if the ones your currently using are masking detail in your system, thereby clouding the information at the rear of the stage. However, I think it's much more likely it has more to do with either your speakers and/or how you've placed them in your room(of course it's also dependent on the other components in your system). If you haven't done so, try pulling the speakers out 4 feet or so from the front wall to give them some room to breathe(it may look silly, but just try it and see what happens). It's impossible to say at this point, but if it's not speaker placement it's more likely your speakers and/or box components are the problem. One other related point, certain music lends itself to this type of soundstage more than others, so if you're listening mainly to mainstream pop/rock it will have less apparent depth than well-recorded jazz or classical music.
Tim
That said, cables can help if the ones your currently using are masking detail in your system, thereby clouding the information at the rear of the stage. However, I think it's much more likely it has more to do with either your speakers and/or how you've placed them in your room(of course it's also dependent on the other components in your system). If you haven't done so, try pulling the speakers out 4 feet or so from the front wall to give them some room to breathe(it may look silly, but just try it and see what happens). It's impossible to say at this point, but if it's not speaker placement it's more likely your speakers and/or box components are the problem. One other related point, certain music lends itself to this type of soundstage more than others, so if you're listening mainly to mainstream pop/rock it will have less apparent depth than well-recorded jazz or classical music.
Tim