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Changes to Step #12

Edit by CChin

Edit declined by Jeff Suovanen

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[* black] If you—like us, and some [link|https://twitter.com/VadimYuryev/status/1396938346002214918|keen-eyed tweeters|new_window=true]—guessed those shiny metal chambers were part of the new speaker system, you were right!
[* black] They're impossibly thin (about 1.5 mm at the opening), but their sprawling surface area equates to quite a lot of internal volume, and therefore more air, and fuller sound. Pretty nifty use of what might otherwise be empty space!
[* icon_reminder] Apple's obsession with audio quality shows throughout their product lineup, as recent teardowns from [guide|139369|headphones|new_window=true] to [link|https://www.ifixit.com/News/50145/airtag-teardown-part-one-yeah-this-tracks|AirTags|new_window=true] have proven.
[* black] Speaking of air, our mid-tier iMac comes with two small fans (vs. just one in the base model). This marks the first dual-fan setup in an M1 machine—which ought to be more than enough, considering how well the [link|https://www.ifixit.com/News/46884/m1-macbook-teardowns-something-old-something-new|completely fanless M1 MacBook Air|new_window=true] seems to perform with the exact same chip.
[* red] Texas Instruments [link|https://www.ti.com/product/DRV10975|DRV10975] BLDC motor driver

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