I am currently using the Sennheiser HD 580’s and each time I turn the amp on it continues to get better.(It’s like watching my baby grow) I do like what the Conductor SL9018 Headphone amp USB DAC is doing with the pairing of these specific headphones at this time. I probably will update my headphone cables soon, but must research a bit. May get a new pair of Audeze’ soon now that I have a excellent amp.
I did purchase an AudioQuest NRG-2 / 1.83m power cord for the amp as I do with most all audio equipment. Will update if any improvements are made with the new power cord.