Hello. One of my speakers is damaged so I wanted it  to be put offline permanently I think it's the bottom right- it's one of the bottom ones so one of the loud speakers on the bottom I would like to be turned off.  There is no app for this other than equalizer apps which only control music playback I need all sounds cut off from that speaker Phone is rooted too.

 

it is out of warranty because it's rooted but I'm not going to do that because it's a waterproof 7i just went to the little shop where I bought it and they said they'll send it out from and give me a loaner while I wait and it they t will tell me if I have to pay or not.