Heh, back in the day, I had a DIY set of speakers (2x4x1 feet) and back then a "record player" was the norm, I had a recording cassette deck even. I never had a room mate complain. - obviously quite a long time ago, and things were different etc.
Today?
No question start the year with a laptop, a DAC/AMP (Total BitHead) and some cans. Then you can see the layout of the land (dorm) and make some plans when you get home.
When you take your turn able and better gear, one thought would be to get one of the old fashion footlockers, and fit your stuff in it. Then you could lock it when gone. (bike lock the locker to a fixture also if worried) Dust, and other things would be taken care of. A footlocker can also be a decent end or coffee table in a dorm room.
On the other hand, my daughter is graduating this month, and going to Tulane in the fall. Of course I can't wean her from ipod buds, or an old set of Bose isolation cans. I tried to get her to use a set of Ety 6i even, but she was too squeemish for IEM. I do need to get her a new notebook though, she has had the same one since freshman year at high school.
I also agree with taking it easy on gear your first semester. There will be a lot more interesting things to do as a freshman at Princeton. A lot of adjusting to do as well.