Actually, you probably mean 1 or 1 1/2 dimensional, as your system probably doesn't render much information about height either.
The *illusion* of depth is created in a number of ways. For *most* systems, pulling the speakers further out from the wall behind them is the quickest, easiest, and cheapest solution. This works, at least to some degree, 9 times out of 10. If there are, err, domestic reasons why this cannot be done, you're up the proverbial creek.
Next up would be the correct acoustic treatment of your listening, but that's more expensive and more complicated, so let's try solution #1 first.
For the moment you can forget all those other tweaks.
The *illusion* of depth is created in a number of ways. For *most* systems, pulling the speakers further out from the wall behind them is the quickest, easiest, and cheapest solution. This works, at least to some degree, 9 times out of 10. If there are, err, domestic reasons why this cannot be done, you're up the proverbial creek.
Next up would be the correct acoustic treatment of your listening, but that's more expensive and more complicated, so let's try solution #1 first.
For the moment you can forget all those other tweaks.