angusluk 發表於 2014-12-27 23:33
I used pre amp box no DAC version and I connect northstar dac and power amp Class a warm sound
I just checked the spec of pre amp box, it is a tube preamp. My pre box RS digital can switch between tube and solid for the output stage, but I don't find there is significant difference in sound signature between tube and solid output... Anyway the sound of my system is warm too