MBP 2016 left speaker ... quiet?!

[WRONG]

Hello everyone!
Let's get down to brass tacks.
I have a 15" Skylake MacBook Pro, and the left speaker seems quieter, more faded compared to the right speaker.
As a whole it still sounds good, but the difference is perceivable.
(last famous words: as I was typing this post, the left speaker went sound faded as hell, and the right speaker is definitively louder)
I already tried NVRAM and SMC reset, nothing worked.
I've seen also that other users have experienced the same problem, sometimes with the right speaker.
What should I do? Give it back to the nearest Apple Store (circa 150 kms)?
Whistle pretending nothing is happening?
Pray?
Any suggestions?
Thanks!

 

[BrianBaughn]

You've confirmed that the balance setting in System Preferences>Sound>Output>Internal Speakers is centered?

 

[WRONG]

You've confirmed that the balance setting in System Preferences>Sound>Output>Internal Speakers is centered?

Yes, first thing that I verified, and it's also the way I noticed the problem.
Switching between left and right make the problem emerge.

 

[keysofanxiety]

Yes, first thing that I verified, and it's also the way I noticed the problem.
Switching between left and right make the problem emerge.

In which case, it's hardware. You've gone through all the troubleshooting and you'll need to take it back to Apple. Sorry!