Is my MacBook's Internal Speaker Blown?

"Try using the balance control in the sound control panel to isolate what speaker is having problems. Don't forget you also have a third speaker! A subwoofer.

It's possible you have something loose which is vibrating. Have you had anything altered in your system? If you did I would review that area."

"I have replaced both speakers of my Mac Pro A1398 Mid 2015, on three (3) times. Still it keeps on bursting the edge of the speaker - rattling sound.

I THINK APPLE SPEAKERS ARE DEFECTIVE FROM THE TIME OF MANUFACTURE.

I have ordered another set this time from Ali express. Last replaced in December 2017. Last pair bought from ifixit, it lasted for 6 months - longest period it lasted. Now again rattling."

"Same problem with 2 MacBook Pros (retina) - out of warranty.

Use headphones, bluetooth to Bose or Jawbone speakers or

Airplay to AppleTV, especially for FaceTime/Skype."

I use EqMac2 to balance out the noise and make it less noise with bass - it works for me.