The parts list is.
x1 big garden hose connector.
x1 female earphone connector
x1 earphone speaker (well any speaker that will fit.)
x1 piece of earphone wires (stereo)
Step 1: Asemble the Parts
2. Solder the female earphone jack to the wires and finally to the earphone speaker.
As you might be wondering by now, Yes its a mono setup. Connect the ground of the stereo cables together,and then the color coded wires to each other.By doing so you convert the stereo setup to mono.
4.It may be a good idea to test the rig now by plugging it into a audio source.
5.Slip the earphone jack down the hose shaft.
6. Skew back the other shell of the connector.
7.Plug in and enjoy..
Step 2: Future Improvements
I would have been nice to maybe amplify the speaker or maybe finding a better quality speaker.