Why does the aurender N100h sound so bright and edgy

I'm with @audioman58 on this one. I have an Aurender N100H connected to an Ayre Codex DAC using an AudioQuest Coffee USB cable. I did upgrade the power cord to a Pangea on the Aurender.  Very happy with the results, better than any CD player or transport I've used and certainly better than the mac air I was using.   

Thanks everyone for there comments being an audio file since 1970 , I know if something sounds right or it doesn't, 5 min listening to the aurender , sounded like everything played was MP3 quality,and I immediately checked this out ,as it was a borrowed unit from a friend with music on it, so my only conclusion must be fawlty unit, when aurender is out of system everything is glorious

Using a nas with Mac mini 

I have the aurender and no issues. I also have the PS DS. I do prefer the aurender.
Thanks 

I can assure uou if you put all hirez files, or Flac,Wav files usjng the internal 
2Terabyte hard drive this would not be the issue.  Running a  iMac you are looking 
Detail server based knly is the way to go.  What are uou guys running gof dacs ? 
And Yes  the digital cable does count. I am using a Audio Quest Diamond.
If the Aurender 100H was this bad it woild not have won at least 5 mayor awards.
I compared everyhing from $3k on down. I had thd Bryson-2 player 
This unit is  better ,and  Aries was not as refined soundjng snd built like a plastic toy compared with internal 2T drive weighs over 10 lbs
And the Biggest memory buffer by far a Solid State 120 Gigabyte. Compare this  with Any competitor. P.s Bryson recommended and is great , DB Power amp
This not only will rip cd but will take your digital files from Apple and convert them 
To Wav,or Flac files,or many other file types for under $40. A great product to get .