Just wanted to jump in here that I also bought the HP-A4BL today and am extremely happy with it. It drives everything from a TH-900 to HD800S and LCD2 just fine. If anybody has questions about this criminally under-the-radar DAC/AMP let me know. Not enough people here seem to own it considering...

  Just got my E10 (new batch) and am using it with a MacBook Pro but I'm having a small issue.   Whenever audio is played after a period of silence (even milliseconds of silence) the first half-second or so is so quiet that it's often inaudible but only for the first half-second and then...