The left internal speaker on my 2018 MBP fried (sounds annoying common). I don't really want to take it in to get it fixed, and I'm hoping I can just disable the left one and use the right one.

In Audio Devices, there is a checkbox to mute channel 1 (left), but I can't actually click it.

Is there another way to turn off a single internal speaker on a MBP?

  • 5
    Can you use the Balance slider under System Preferences > Sound > Output ?
    – Fyrefly
    Sep 4, 2019 at 15:33
  • Thanks Fyrefly! That did it. If you want to make it an answer I'll accept it.
    – ericksonla
    Sep 4, 2019 at 15:35
  • The speakers are pretty cheap, and from a quick view of the photographs, they look really easy to access and replace. Have you considered repairing this yourself?
    – Alexander
    Sep 5, 2019 at 19:28

2 Answers 2


Simple method, as already stated, System Prefs > Sound > Output. Set balance slider to the right.

More comprehensive method, in case you are listening to stereo & need the information otherwise missing from the other speaker - you also need…

System Prefs > Accessibility > Audio

check 'Play stereo audio as mono'

This will sum the left & right channels so you will hear both from the one speaker after you balance across to it.


Open System Preferences > Sound > Output look for the balance slider and adjust as needed.

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