Another way to use the iPod without a head unit similar to the JL Audio CL-RLC is the PAC LC1. They work in similar ways, but the JL Audio piece is a more sophisticated product. Because the LC1 doesn't have a preamp, it will only attenuate the output of the iPod. The iPod by itself might not have enough output to drive the amplifier. You're not going to get the sound you desire and will probably seek to compensate for this by increasing the gain on your amp. But doing that will very likely introduce noise to your audio system. There is a difference in the prices for the two products (the JL Audio CL-RLC is about $50-60 versus about $10-20 for the PAC LC1) but potentially an even greater difference in the overall quality of the sound.