I have the PX but havent found a usc-cable that works so i just took your advice and ordered one from Amazon. Question: when used with normal 3.5 cable there is a hissing sound. Is that not present when running with the usb-c cable?
Almost no hissing... The sound now goes directly into the PX DAC. So unless you have an LG V30 with a quad dac, your sound quality will improve by using the USB-C cable