some systems work on 8 ohms, some 4 ohms, some 2.5 ohms, the ohms ratings must match or you will have issues with levels, if your output rating is too high compared to the input rating of your amp then you could do some damage, I would not recommend trying to hook straight into an amp, you can pick up a simple deck with an aux input that will allow you to hook up mp3 players for cheap and this will work for an ipod then you wont need an amp.