I’ve been testing out a couple of ifi products lately. In this video I compare the ifi Zen DAC and ifi Hip DAC, and let you know what my experience was using each of these devices. My preference was for the Hip, but there are definitely some reasons why someone might want the Zen instead.

Here’s links to stuff mentioned in the video (some are affiliate):
Ifi Hip DAC: https://amzn.to/3vXfuJu
Ifi Zen DAC: https://amzn.to/31trRyZ
iPhone OTG Cable: https://amzn.to/3cjseSR
Ifi Power Supply: https://amzn.to/3d80uQj
Cheap Power Supply I think would work: https://amzn.to/3fcD0fC
4.4 to dual XLR (if you’re thinking about using the Zen as a balanced DAC): https://amzn.to/3da6hoC

As usual, I’d also recommend looking for used options at:
HeadFi: https://www.headfi.org/
HifiGuides: https://forum.hifiguides.com/