Speaker placement can also play a big role in what sound you get.  If you feel like it sounds "boomy," one thing we'd recommend is to try and keep as much room as possible between the back of the speakers and any walls as you can. When setting up your speakers in a tight space, one thing that may be worth trying if possible would be toeing the speakers in or out a bit; this makes the port uneven with the surface of the wall behind it and can help reduce reflections (which cause that "boomy" sound).