I have played my new Alpha Dog Prime headphones through my DAC 2 HGC. The sound makes me smile and play music much too long!! I couldn't get the volume knob above 2 or 3 o'clock without hurting my ears. The cable end is 4 pin XLR. So I am making up some cable extensions with different ends to use with other gear. I appreciate the thoughts you are sharing as I am new to headphones, other than a set of Sony headphones that I had forty years ago and are long dead and gone. Can't imagine taking them on the road though. So I am contemplating a set of custom iems and associated gear.