Well, Berklee (I am an alum) is very much oriented towards contemporary music. I assume, from what you say, that you are not planning on being a performance major. If you are, to be honest there are many schools which are more appropriate if you want to be a classical singer. Boston Conservatory and New England Conservatory (both in Boston) are both good classical schools. If you want to get into a more contemporary style, then Berklee is great.
Whether you are a performance major or not, I would actually recommend either a SM 58 or
a Beta 87A. The 58 is the most common live vocal mic in the world, is a great mic, and it would be wise to be familiar with it. If you get into the Berklee Performance Center (the big hall) or you do a recital in the Friend Hall (mostly just used for school functions) you will probably be singing into a Beta 87A. The lead live sound guy there prefers 87s (or was when I was last there), and so in the "prestige" halls, that is what is used. The 87 is a condenser, however, and I do not know if all the rehearsal rooms have phantom power, so it might not work. In the two recital halls you are most likely to work in, you will be singing into SM 58s, so again, it would be good to be familiar with them.
Do you know what hall you are staying in yet? I hope, for your sake, that you are not in the 150 Mass. Av dorms. They are stinky little holes. 270 Comm. Av has much better rooms, but the last time I heard anything, it was peopled by cretins. The best is, by far, the 98 Hemmingway dorms. Not great if you want to party, but the best place to stay if you want to be serious about you studies. If you end up moving out of the dorms, Allston and Brighton are great, but get a place close to the C line, cause the B line goes right through Boston University, which sucks.
Oh yeah, do the crew a favor and learn to eat the mic, whatever anyone in here tells you. Trust me on this.
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M.K. Gandhi