Setup: DAC: Aune T1 with upgraded 6922 tube. Purchased with the HE-400, great little DAC/AMP. Frequently compared against the ubiquitous Schiit Modi/Magni stack. AMP: Emotiva X-Mini A100. Normally a speaker amp, but this one was modded to support a headphone jack. With two 150ohm resistors in series - supposedly a very decent amp for orthos such as the HE-500. Software: Foobar 2000, and FLAC quality rips. Burn-in hours: About 100hrs, wasnt able to get in a full 150hrs due to selling the HE-400s.  *Both the 400 and 400i have...