No I'm confused. After doing a ton of searching it looks like the first cable that The Apple posted is all that is needed.
Can someone that knows please reply to this. I read somewhere that the iPhone will only work with the type of audio connectors that I posted pictures of. Something about it needed the 3 ring type of connectors. That's why you can't use standard headphones in an iPhone.
Anyone know for sure?
I've used Bose headphones with my iPhone. The connector that goes into the iPhone has two rings.. I did actually have a problem with a set breaking after I used them a couple of times (sound would only come out of one side).. Are Bose headsets not compatable with iPhone?
Assuming that your AUX input on your stereo is 1/8" stereo input, then the cable that the Apple linked will work without an adaptor. It's designed to fit in the recessed headphone port of the iPhone. The reason that some people were saying you needed an adaptor is that most stereo cables that are not designed for the iPhone are too big to fit in the recessed jack of the iPhone, but this one will work fine.
FYI, the 3-conductor connector (tip, ring, sleeve) carries stereo audio (left, right, common ground). The 4-conductor tips add a microphone signal (for earbuds that have them, like the ones that came with your phone). The 4-conductor recepticle on the phone is designed to also accept 3-conductor connections, as long as they fit in that annoyingly recessed hole.
The 4th conductor you see on most iPhone headphone adapters is tied to ground and does nothing.
Just thought I'd clarify for those who give a hoot.