The Ipod dock speakers are probably amplified (definitely if the unit has battery power or a mains adapter). If the amplifier has crapped out then it would take some knowledge of electrics (not necessarily electronics) to wire up its speakers without the amplifier section. Ditto if you want to put some external (amplified ?, you don't state) speakers in place of the existing ones if the plugs and sockets don't match.
You would probably need to use a soldering iron to hook stuff up reliably in the sort of connection (I think) you wish to make.
Unless you have soldering skills there's not much you can do with this project except get the help of someone who does.