This is my new desk. It's up against a wall.

These are the speakers I'm using.

I've noticed that I can't get a great sound with the speakers on this new desk, and I'm sure it's because of the boxed-in type design. Currently I have the two speakers on both sides of the monitor. The sub is on the floor under the desk, but the sound bounces around in the under part of the desk, and it sounds muffled.
Yes, I am about to get better speakers. Granted it's only a 2.1 set up, but would the sub be better up high somewhere? On the desk next to the other two speakers? Should the speakers be moved? I've played around with the set up, but I know someone here knows a lot more about this than I. Any tips would be appreciated.

