Cooler tones and ample lighting are two ways to make a space feel larger. Furniture pieces with slim legs and details that are lifted off of the floor a few more inches, give an airy, spacious look. You might also consider incorporating reflective surfaces such as a mirror to catch light, or a polished lighting fixture to draw the eye upward. Hope this helps--good luck!

Paint the ceiling the same color as the walls. Get rid of the wall sconces which draw attention to the ceiling height.

you need a lower long console for the tv, move those tall speakers more left and right, say tucked by that chair. turn those wall sconces into picture lights hang long narrow pics there, and lower the tv.