If you—like us, and some keen-eyed tweeters—guessed those shiny metal chambers were part of the new speaker system, you were right!

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!

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 completely fanless M1 MacBook Air seems to perform with the exact same chip.