Hi, I'm Pete. Welcome to JustAnswer! I'm reviewing your question now, and will post back with your reply ASAP.
If the sound seems quite low when set to maximum, check that the speakers are not obstructed, e.g. by a cover.If you still can't hear the sound on the small built-in speakers very well, then you could try using an external bluetooth speaker - these are great for listening to movies and they are much louder than the small built-in speakers.