DAC/AMP combo (Darkvoice 336se & Komplete Audio 6), should I change it up?

Just got my 336se in for my HD650’s and have been running heat cycles on the stock tubes for a couple days to help minimize the hum. I already owned the Komplete 6 and was using it for a while but figured it wasn’t giving the power output to get the most from my Senheisers. The output on the DAC is TRS and the Darkvoice has dual RCA’s on the back so I bought an adapter as well, but is this really how I should be doing it? I’m sure there are better DACs to combo with the AMP but I gotta work with what I got, and need to make sure I’m setting it all up correctly.