If Your android phone is old you get your speaker sound is very poor.if you want make your android speaker much better just use this clean speaker app..it will make good result on your phone.
Cleaning your speakers can be tricky. This is because there are a few parts on the speakers you have to clean. You have to be careful when you clean your speakers because some of the parts are delicate and you do not want to damage your speakers. You should clean your speakers periodically so they will give you the best sound possible.
Download Speaker Clean App From PlayStore
Direct Download Apk
watch the video how to clean your android device