New A1398 Left + Right Internal Speaker For Macbook Pro 15 Inch A1398 Speaker L/r Set Replacement With Tool 2012 2013 2014 2015 - Speakers - AliExpress
What to do if the sound on your Mac isn't working | Macworld
MacBook Has No Sound? Get Not Working Sound Back Easily
My MacBook has stopped showing 'Internal Speakers' in the Sound System Preference. I am not able to listen any audio. How to can this be fixed? - Quora
Teardown of 13" MacBook Pro with Touch Bar reveals “cosmetic” speaker grilles, other tidbits