Hmm some things i have to pick at isnt the quaity of the render or the modeling its all awsome, just the positioning of the objects.
Wouldnt the two speakers either side be behind a sofa or somthing away from the TV, because having them near the front kinda defeats the object of surround sound, becuase it would all be in front of you. (if i said that right)
Is you TV really that small on an oversized TV stand?, why not just make the tv a tiny bit bigger in the render and make it fit right unless your going for a photorealistic representation of your living room. Why not render the whole room and put the speakers in the right areas

would look kool.
The render is really sweet, its nice and crisp. I also love the modeling all the edges are perfect you really get the feel that its the real thing, superb work.
And finally what all the others has asked, is it your render? Because the explanation isnt that clear