Originally posted by: SearchMaster
The SQ of even the best FM modulator is pretty poor relative to what you'd be used to. What kind of car do you have? What kind of stereo? IIRC you have a Mazda3 - there is a unit you can buy for ~$100 that will simulate an external source (i.e. if your car has an optional CD changer or MD/tape drive), so that you push that external source's button and it gets sound from any other source, such as your iPod. They are usually called Auxiliary Input Adapters (google it -
here's an example for the Mazda3 at $79). I ordered from that company a similar unit for my Maxima, and it works very well, providing ease of use and very high quality sound. You have to be willing to pull the head unit out of your dash though, so consider your warranty, etc.
Now, I have a Mazda6, and there's only one company that makes adapters for it (and they are very backordered). Or I have the option of using the unit I linked for the Mazda3 and soldering some wires together.