Nguyen, what speaker and interconnects are you using? I have used
Kimber 8TC speaker, PS Audio Statement, Goertz Alpha Core AG1, for
Interconnect, Cardas, Silnote Morpheus II, Alpha Core Sapphire silver.
I should also mention that I also have the Eastern Electric Mini Max DAC
currently connected. I haven't tried the Metrum Octave yet as it is currently
doing duty in my main system. I've been using the stock power cord.