How to Build Custom Speakers : 25 Steps (with Pictures) - Instructables
For next to nothing in cost you can make a simple and effective home made speaker for your smartphone from two Styrofoam cups and empty toilet paper roll. In fact a simple
How to Make Your Own Speakers: 12 Steps (with Pictures) - wikiHow
Homemade Speakers for a Home Office
How to Make a Speaker : 18 Steps (with Pictures) - Instructables
How to Make a Speaker : 18 Steps (with Pictures) - Instructables