Bluesound Vault 2i, Cocktail Audio X40 or ??????????

I ripped my CD's with dbpoweramp to wav file . I didn't change any settings other than  rip to wav and where to store the files and my Node2i found them without any problem when I hooked it up and built the index.  Maybe dbpoweramp stores in the format needed  for the album art?  I use an external dac which sound significatly better than the one in the node2i not sure about the vault 2i. 

Benchmark DAC 3B and I use my wife for blind testing. I know it is not a perfect test but if she asks why it sounds so much better then it works for me. 

The Benchmark doesn't unfold MQA but it does play MQA in 24/96.