Advice on using QC as audio interface on iPhone

Hi all. I’m looking to learn some best practices about using the quad cortex as an interface straight into my iPhone. I have an iPhone 15 that has a USB-C port, so I am using the USB out into my iPhone. I flipped the USB outputs, so that one and two send the processed signal, So I’m getting the outputs I want but it is very quiet. I don’t really see an option to increase this, but it’s fine in headphones or using XLR out. Is there a better way I should be doing this? Thanks in advance.

No idea… but I’ll play around with mine this afternoon! I never even thought of plugging the QC direct into the 15!

Yeah, I also find the USB audio weak in the DAW too and usually opt for the XLR connection. Just curious if there’s something to tweak. I even increased the cab output a few DB to try to pull it up.