I just received my new Hi-mDAC headphone amp and DAC. In my second system I have been using the $9 apple lightening to 3.5 headphone jack with RCA connections into my pre amp and thought I’d give the Nuprime a try. It’s $130 plus a lightening to usb camera cable for $33 (not included) for IOS iPad Pro. Long story short........ it sounds fantastic, clarity, dynamics and much better low end. I could not be happier.