Enzo618, yr lack of side walls will primarily result in the lack of LF energy. this tends to be the case with very "open" setups (you may want to consider getting subwoofers at later on to supplement yr Rockports). 1st you gotta sort out some fundamental set up issues.
i'm assuming you've placed yr speakers close to the front wall for bass reinforcement. this is fine, but straighten yr speakers (i.e. no toe-in), then try to move yr listening position closer to your speakers (you're getting too much reflection off the rear windows - which causes the muddy sound). there should be a position where bass, mids & HF becomes well balanced (i.e. neither is more prominent than the other). you should also start getting better image depth at this pt. this is most likely the ideal seating distance based on the interaction btw yr speakers & room. next, try moving the speakers closer to one another (still pointing straight ahead) until you get a nice sharp/solid image. it's all abt fine tuning fm this pt. on... experiment with toe-in, speaker tilt, etc. until you're happy with tonal balance, left-right imaging (this should not be a problem for you cause you hv no side wall reflection), & front-back imaging.
since this is not a dedicated listening space, you've also got to be able to live with this layout (if layout isn't acceptable, then you've prob gotta make some compromises in sound quality).
i agree with some of the other posters abt adding an area rug (this will reduce floor-ceiling reflections & also make yr system sound less muddy).
anyway, i think Rockports are really good speakers, so i really hope you manage to get it to work. good luck & try to hv fun when experimenting.
i'm assuming you've placed yr speakers close to the front wall for bass reinforcement. this is fine, but straighten yr speakers (i.e. no toe-in), then try to move yr listening position closer to your speakers (you're getting too much reflection off the rear windows - which causes the muddy sound). there should be a position where bass, mids & HF becomes well balanced (i.e. neither is more prominent than the other). you should also start getting better image depth at this pt. this is most likely the ideal seating distance based on the interaction btw yr speakers & room. next, try moving the speakers closer to one another (still pointing straight ahead) until you get a nice sharp/solid image. it's all abt fine tuning fm this pt. on... experiment with toe-in, speaker tilt, etc. until you're happy with tonal balance, left-right imaging (this should not be a problem for you cause you hv no side wall reflection), & front-back imaging.
since this is not a dedicated listening space, you've also got to be able to live with this layout (if layout isn't acceptable, then you've prob gotta make some compromises in sound quality).
i agree with some of the other posters abt adding an area rug (this will reduce floor-ceiling reflections & also make yr system sound less muddy).
anyway, i think Rockports are really good speakers, so i really hope you manage to get it to work. good luck & try to hv fun when experimenting.