Docking station for an iphone

I’d like to know as well.

My understanding is you can use the Apple Camera adapter wire to go from Iphone Lightning port to USB and DAC. It cost about $35 as I recall. Its the only Iphone to usb wire option that works I read

Anyone using it that way? Sound quality?

The lightning to usb wire taht comes with Iphone to charge does not work for audio out. You'd think it would but you  have to buy the extra wire from Apple if you want to do that.   Clever Apple!  Should work to a tee I would expect if you have to pay extra for it.

There may be other kinds of devices that can do it. Have not done that research though.

As I side note, I have found quality of analog out audio from newer Iphone 6s and Ipad mini to be better than expected and might be good enough to fit the bill for many. But I would like to be able to use my external DAC as well with Iphone.

What is the source of what you are trying to play from the iphone? Are you looking for convenience or highest sound quality? What inputs types are on your dac? 
For convenience you can get a usb bluetooth receiver that will attach to the dac and grab any signal from the iphone or other bluetooth device. 

As with most things digital, a question usually leads to a few more before a good solution arises :-)  Cheers,
Spencer

sbank what options do you know of?   I like sound quality and convenience.   Might sacrifice some latter for teh former if needed.

I'm pretty sure that Wadia made one.  I think it was the 171i that worked with the iphones.

Pure i20 is compatible to  iPhone 4.......