If you’ve been one of the unlucky EVO 4G owners who have replaced the device speakers a few times already, XDA forum member dabigcheezze has shared his experience in actually fixing the speaker itself rather than replacing it.
Firstly, a disclaimer from the XDA member! This could break your speaker so try it at your own risk!
The XDA member has tested this on 2 EVO’s which both now sound perfect. From his findings, it sounds like issues are due to a lot of built up metal shavings which weigh the speaker cone down and prevent it form making the true desired frequency.
To implement the fix, you’ll need an earth magnet, and you’ll need to dismantle your phone, then follow the simple instructions on the forum thread!
Don’t forget to provide feedback, if you try this and the results are successful!_________