Was expecting louder stereo speakers. Left is very low.

I have a hard time believing it's quieter. I keep having to turn down my 7 plus.... Maybe it's a bad phone.

 

Haven't experience this. Both of mine are pretty well balanced.

 

If you look at the picture below the left speaker (ear piece speaker) needs to be at a lower volume to achieve stereo sound because it's aimed right at you while the right speaker (bottom) is pointing away from you. If both speakers were at equal volume the sound would seem to eminate more from the left side than right.

 

I think in portrait mode it behaves different.

 

Mine aren't even close. My bottom speaker completely drowns out my top speaker.

 

Are they evenly balanced under Settings>General>Accessibility?

 

I think you've got an bad phone. Mine is way way louder. They also seem pretty balanced

 

They were. I have to slide to adjust when listening to phone. Then I slide back when listening to anything else.

When I first got the phone, I wondered if the top even worked. I have to cover the bottom to even hear the top.

 

That definitely sounds like a defect. I have great stereo balance on my Plus. You might want to get that checked out by Apple.

--- Post Merged, Oct 5, 2016 ---

There is no left bottom speaker. The second speaker is integrated into the earpiece.

 

The left bottom "speaker" houses a microphone.

 

They are not balanced. The left speaker is about 4 decibels quieter than the right. This is even more exastrabated if you cup the right speaker with your hand as cupping the left speaker doesn't not increase the decibel level on the left as the right. And also if you have a case that redirects the bottom speaker forward it makes it much louder than the left speaker

--- Post Merged, Jun 6, 2017 ---

I guarantee that your plus is the same as his. You probably just don't notice it as much. Use a decibel meter and see.

 

In my case it’s emanating more from the right side. In loud environments I can hardly hear the caller. I think something has gone wrong on my iPhone or an update has caused a glitch.