Gary,
I have the 2.1x balanced dac and I used mullards which I love. any tubes you put in the dac will give you more than a $400 improvement over the sound of the sovtechs.
I have the 2.1x balanced dac and I used mullards which I love. any tubes you put in the dac will give you more than a $400 improvement over the sound of the sovtechs.