Open a new file with 308x470 px and 300 dpi.
Take the shown instrument 
and try to represent a box designed for audio system. The box must be painted in black.
Blending Options-Inner Shadow
Blending Options-Stroke
Gradient's parameters:
Represent now the last part of the big speaker. Apply the next tool 
to choose the correspondent cliché like it is demonstrated in the picture.
Fill 0% on the layers.
Blending Options-Bevel and Emboss
Blending Options-Gradient Overlay
Gradient's parameters:
Take the next instrument 
and create the lowest layer of the central part of the speaker.
Fill 0% on the layers.
Blending Options-Gradient Overlay
Gradient's parameters:
Represent now one of the layers of the speaker's mobile part. It's possible to apply the previous instrument too.
Fill 0% on the layers.
Blending Options-Stroke
Gradient's parameters:
Pass to the second layer.
Fill 0% on the layers.
Blending Options-Stroke
Gradient's parameters.
Represent now the third layer with the same instrument. ()
Fill 0% on the layers.
Blending Options-Stroke
Gradient's parameters:
Pass to the fourth layer.
Fill 0% on the layers.
Blending Options-Stroke
Gradient's parameters:
The fifth layer.
Fill 0% on the layers.
Blending Options-Stroke
Gradient's parameters:
And the last layer of the speaker's mobile part.
Fill 0% on the layers.
Blending Options-Stroke
Gradient's parameters:
You must represent now a relief surface on the speaker itself.
More Tutorials: 
