This tutorial shows how to create a 3D speaker icon using simple layer styles in Photoshop. Key steps include creating round and elliptical shapes to form the speaker components, adding gradients and layer styles to add lighting effects and dimensionality, and using shapes and the pen tool to create a reflection and legs/shoes below the speaker. The full tutorial contains 17 steps and the finished icon is shown at the end. The author also promotes a paid membership to access downloadable PSD files for tutorials.