Is your dorm room surrounded by cinder block or drywall?
I had quite a few dorm rooms in my college days. Most were one (or two in corner rooms) concrete exterior wall with a window, a concrete inner wall, and an opposing drywall one (shared with neighboring room).
Corner load to the intersection of the two concrete walls if possible. The way most dorms I've seen are built, you'll get ugly sound and feeling from that drywall section if you put it near there. Dorms are built for fireproofing and safety, not optimal acoustics.
Good luck! =)