I have a nice Burson Conductor V1 with the 1793 dac. Thought I would never sell this but no longer use headphones. I have the original box and remote. This thing is heavy and very well built. I think it listed for 1700.00 new. Had the mid range Schiit and Audio gd amplifiers and much preferred this with my T1.2. Also I never used the usb but assume it works well. Shipping is on me.