Yes this is something that is very useful. My CLAS dac has a wall wart with barrel connector and you need that cord where as the HP-P1 has the usb. The two have different sound signatures, the CLAS is more full and warm and the HP-P1 is more detailed with better instrument separation. Both good, i have portable units coming out of my ears though which is why both are up for sale. I have the ak120, and Hugo as well as HM801. The 801 is too beat up to sell and outdated due to storage and no apple file play, just wave and flac, the 120 feeds the new Hugo, so that leaves me with these two to try to pay off the Hugo-crazy expensive.
Here's my stack:
Here's my stack with its wall-warts: