Ok so here is what i got going on. I cut both ear buds off of a set of old head phones i had. I want to wire each side L and R to a speaker. I tested this to see if it would play without having to plug in the speaker or anything. It works like i though it would, however im trying to find out what watt speaker i can put on each end of the wire and have it still be able to play without any power source. Just the ipod straight to the speaker. The speaker i tested was 4Ohm 3W. Anyone have any ideas as to how high i can go with it?