I dunno about everyone eles, but i think the speakers on the 15inch macbook are decent and loud for laptop speakers. I dotn use my external speakers to often (there harman kardon soundsticks) cause my mom gets pissed when i play to loud. anyways miley cyrus and some JB sound awesome on the 15inch macbook pro speakers. (LOL jk) My question is, i always play them to the max and they sound decent to me, is it bad to play them loud all the time? can i blow them? will the vibrations from the speakers screw up the harddrive or any other moving parts in the macbook?