@tonyfriends sure looks like it is held together by 6 screws located at the front of the unit. Try to pop out the silver front bezel as well as the speaker grill. The screw pattern matches the bezel....:-)
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While you work on your speaker, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.
Repair is War on Entropy!