Newbie needs HELP!

You'll probably want to hunt down some form of USB Y Cable that splits power and data. Connect the power section to the hub as needed, and connect the data-only to the dac.

Suggested viewing:

https://www.youtube.com/watch?v=L1BK-UtNhK4

https://www.startech.com/ca/Cables/USB-2.0/Mini/3-ft-USB-Y-Cable-for-External-Hard-Drive-USB-A-to-mi...

https://www.musicservertips.com/how-to-articles/iphone-digital-audio-output/

Beyond that, Google is your friend.

Hope that helps.

Absolutely helps. I’m just frankly amazed that this seemingly simple issue is this friggin complicated. Ha. Thx so much for your knowledgeable input. Cheers,  Mike

@mstrauss  You will benefit from using a 'reclocker' between your iPhone and your DAC. There are a number of options like the Sonore microRendu, Wyred4Sound Reclocker, SoTM, etc.

This will not only solve the problem you are trying to address, but also improve overall sound quality and musical performance. A true win - win with a small additional investment.

The 'reclockers' come with their own power supply, which can be upgraded to a linear power supply for even greater sound quality improvements. See how you like overall performance via the stock switch mode supply (wall wart) and decide accordingly. It is a worthwhile second future step. 

Whichever device you go with, check with Peachtree for compatibility (or the manufacturer of the reclocker).

Good luck.

If you don't already have one (I am assuming you do, given your question) you will need the iPhone 'camera adapter' or lightning to USB 3 adapter. 

@david_ten   Thx for pointing me to a reclocker, which I’ve heard before but without your direct and clear explanation/benefit. I’ll check your recco’s for compatibility and I assume they provide their own power AND enuf power for the dac as well? And yes, I’m currently using the newest version of Apple camera adapter(the one w 1 usb output & 1 lightening output). Thx again, Mike