Woo Audio WA7 Fireflies USB DAC and Headphone Amp w/ Sennheiser, HiFiMAN & Beyerdynamic Cans - YouTu
*UPDATE* I forgot to put the non-slip rubber pads on the glass, I found them and now glass doesn't slide around at all! *UPDATE* After listening to my Xonar STX for about 3 hours today then switching to the Woo Audio Fireflies the difference is even more ...