And it's not even about only headphones. It's about billions of audio devices that take one thing as input: line-level audio. Home stereos, car stereos, portable amps, hotel-room docks and TVs, PA systems and mixers.
Then there's the idiotic problem that Apple created but never even solved: blocking the phone's sole port with a "headphone dongle," which prevents you from CHARGING the phone. So now if you want to listen to music while navigating (which kills the battery quickly), you're screwed.
I ended up buying a few of the Lightning-to-30-pin-iPod adapters, which you can then plug a USB+audio cable into. Yes, the ancient 30-pin iPod connector has line audio out, and the cool thing is that it's a true line out; the volume control has no effect on it, so you only have one volume control to dick around with (the one on the amp).
Then there's the idiotic problem that Apple created but never even solved: blocking the phone's sole port with a "headphone dongle," which prevents you from CHARGING the phone. So now if you want to listen to music while navigating (which kills the battery quickly), you're screwed.
I ended up buying a few of the Lightning-to-30-pin-iPod adapters, which you can then plug a USB+audio cable into. Yes, the ancient 30-pin iPod connector has line audio out, and the cool thing is that it's a true line out; the volume control has no effect on it, so you only have one volume control to dick around with (the one on the amp).