iFixit

…and right on cue, out come the speakers.

Apple claims that their custom speakers make the most of "every cubic millimeter" inside the MacBook Pro. For $2200, we sure hope that they wouldn't be plug-and-play.

The dual DXEC02 bottom-port Knowles MEMS microphones (with Job Id/Tape Numbers) lie underneath (or on top of?) the left speaker assembly. They use an "adaptive beam-forming algorithm" to cancel out background noise to make it easier to talk to your computer make calls via Skype and improve the speech recognition performance.