You're welcome to call me a liar, but I had to get a replacement base model 2011 15" because a week after I got it a random web music player blasted a ridiculously loud mp3 over the internal speakers and the sound was noticeably distorted and lower volume after that. So I'd say you can, but I've also never had that happen on previous macbooks.
did u ahve to say much to get it replaced?
my hinge has been making clicking noises everytime u open it passed 90 degrees :s
i got mine in march though
thanks again for your input on the speakers!