You play well enough without setting up that bizarre contraption in my opinion, but it's a matter of preference. I think in a large scale FPS like PS2, sound positioning is less effective because there's a lot of sounds going on at any given time. Much more than in your standard FPS. It'll help for squad based FPS like RO2, I'm sure...
Then again, I am a little deaf myself so my opinion may not be the most relevant.
