We wrestle a small board from the adhesive holding it to the barrel, and notice two Conexant CX20810 ADC chips by Synaptics for the microphone array.

Not to be outdone, the board has a microphone of its own—likely the low frequency microphone for woofer calibration.

This mic essentially listens to the woofer output and, through some fancy signal processing, fine-tunes the woofer to get the best performance possible while keeping bass levels in line with other frequencies.

Back to the rest of the microphones: they come in two long strips of three mics each. Each strip is glued firmly to the inside of the case, with the mics positioned over funnel-shaped channels.