Posting further info;
This is an all- triode tube design that runs Class-A in all stages. It can also run as a active Preamplifier to give it some tube magic if put in between Solid state dac/amp. Its highly resolving and sound is completely improved over the original Valhalla. Very musical and detailed. It can drive low and high impedence CANS no problem. Personally had it paired with Sennheisser HD650 and sounded wonderful. Many people pair also with Senn's flagship HD800 and report wonderful pairing as well. Its also built solid and has a good weight to them. The only reason why I am selling is because I am going portable.
Thanks!