Measure the speakers in order to build a six-sided wood casing that accommodates their size. Leave one side off the casing. This final piece will become the front face of the dock and a bezel for the speakers.
Cut two openings into the unattached side. Slide the speakers into the openings, and affix them with epoxy.
Make two small apertures in the top of your dock. Cut one with the electric drill. This must be large enough for the 3.5 mm male speaker jack that will connect to the MP3 player. The second opening is for a 30-pin dock connector, or comparable MP3 wall outlet adapter.
Run the wall outlet adapter and the speaker cable through the openings made in Step 3, and use a small amount of wood putty to partially close the apertures in order to keep the cables from sliding back through into the casing.
Cut two more openings in the back of your casing for both the speaker and MP3 adapter plugs. Run these plugs through the holes.
Close the casing by attaching the front face of the dock.