How to ACTIVATE second LOUDSPEAKER?

Hello everybody. I've got a Huawei P8 Lite (ALE-L21) and i noticed that it has 2 loudspeakers on its bottom, however, only one of them is active. Everything i play, a song, a youtube video, a game music, it only plays on the left audiospeaker, but not at all on the right one. So does anybody know how can the second loudspeaker be activated as well, in the same time with the first one? I searched on its settings and on the internet, but i did not found anything about that.

Loudspeaker microphone don't work on apps

Hi there, i recently upgraded my rom from the stock rom to RESURRECTION REMIX 6.0.1.
When I went to use the loud speaker function my friend said he could not hear me, after testing a few other apps I seem to get the same problem on skype when turning on loudspeaker.
I have tried a few different roms but they all give the same bug, I have also tried redoing everything again from putting a new recovery on to a new SD card, Also tried cleaning out all the microphone holes.

I'm a bit of a noobie on this as this is the first phone i've really messed around with, any ideas what could be causing the issue? It's really starting to bother me.

Loudspeaker problem

I use the device for the week, and today i got the problem with the loudspeaker, is so low under the maximum volume. Do you know any idea how to resolve the problem?

Voice calls always on loudspeaker after Android 6.0 update

Hi,I use Galaxy Tab S 8.4 LTE. I recently flashed Android 6.0.1 (aosp) on my device. After that whenever I receive or answer calls it's automatically on loudspeaker. Toggling the loudspeaker button on the screen doesn't change anything.
Any help please? Thanks in advance

(My first thread)

loudspeaker stop working after screen replacement HELP !

all is in title just for to be clear
the loudspeaker work but I noticed the spk P work and spk N not work in motherboard !!!
but if I touch the side of N speaker with any metallic element from motherboard its working but with crackling sound !!
this problem is right now not resolved for many person
help me if some one have solution !