Thanks for your response, and thanks for your advertisement
But that you said is a problem that I don't have the response: wich amps could I use ? I would like to buy ones that have a volume regulator inside (don't know if it's a perfect english ), but I don't know were I could buy it... Have you example to show me wich amps people use to use ?
Any MP3 external speaker with volume control could be used. You could buy one online for 6 ish $ or you could go to some cheap store (A dollar store for example) and find one there
I actually have that one. The ipod port is not a problem to put the sound in if you have this pinout and are good at soldering small points.
(opps forgot about the forum censor just google "made by bacteria ipod speaker pinout")