+1 randy-11
Closing a room or making a room smaller will increase the amount of bass problems you have in the room because you will be causing more bass nodes that will cancel/boost certain frequencies.
An open floor plan will actually help bass response because the open parts that lead to other areas of the house are essentially doing the same thing as "bass traps" (allowing the bass waveforms to escape instead of bouncing back towards the speakers and cancelling certain frequencies).
What amplifier are you using. Since these are panel speakers, they really need a very high-current high-power solid state amplifier to really drive them. If the amp is good and you still lack bass, add a powered subwoofer.