Hi all, It has been a while since I have posted. I have searched and re-searched, called around, and searched some more but could not find a true definitive answer to this question. I have a 2004 Mach 460 radio with the cd/aux button in the upper left hand corner. I have recently (finally) gotten my music collection all digital and much of it on my iphone. In my daily driver Explorer, I use a cassette adapter to play it and it works well enough. Once spring rolls around and I take the Mustang back out, I want to be able to listen in there as well. The system is completely stock and sounds "good enough" since I let the exhaust drown it out on most days anyway. So the question is, is there an adapter that allows me to play this through the factory radio? If not, is there a wired FM modulator that really is worth the price? OR If I get an aftermarket unit (thinking double din with blue tooth streaming audio) can it successfully be integrated with the factory system without it sounding like garbage and/or blowing out the tweeters? Again, I have found answers to all of these questions, but each one seems to contradict the one before it. I also called Crutchfield but did not get a definitive answer on the tweeter issue although they said they have an adapter to plug into the factory amps (and a 12v to 5v converter needed to eliminate a system thump?????) I am fairly decent with car electronics and do not mind spending the $ if needed, but really just want to play my iphone through its 3.5mm jack in my car! Thanks in advance.