I got a Logitech Z-2300 system in my dorm room at college, and I'm just wondering if taking off the black cloth cover that comes with the satellite speakers will make any difference in how my music/movies/video games will sound.

Additionally, I am just wondering where is the best place to place my subwoofer? I read that I should place the subwoofer where I would usually sit and then move around the room to see where it sounded best and then place the subs there (while running the 20hz sound test). I found that the subs sounded best (when it was on my chair) was under my desk/table; so I placed it there, however, it didnt sound the same when I swapped places with the subwoofer. I'm wondering if I'm doing something wrong, or is it suppose to be this way?