Are the pictures of your system up to date? Looks like you have system setup problems to me. Is that the subwoofer over in the corner?...if so, thats not a good place for it at all. No crossover will blend that subwoofer, with those speakers...in any way, that will ever make you happy.
The speakers need to come out a little (if they can), and all that stuff between them needs to go, except the little subwoofer...it goes somewhere in there.
If you must keep the TV...get a small stand for it. Move all that other stuff out of there, and move the subwoofer in.
Dave