I was so impressed by the reviews of the Aegir (one in particular that raised the thing to Stereophile Class A) I bought one in late 2019...it shut off when playing at a not so loud level (I don't listen at "actual" loud levels and my speakers are a claimed 99db efficiency) and Schiit said "send it back." I did at their expense and the second one they sent had the same issue albeit not as bad as amp 1, so I sent that one back and called the whole thing off. The good news is that when I put my SEP Dennis Had Firebottle HO back in the system it sounded so much better than the Aegir I was again just fine. The Aegir shut-down issue might possibly have been due to my having 2 REL subs plugged into the Aegir, which although this has worked fine with other SS and tube amps (the RELS apply a very high 100,000 ohm load for the High Level inputs which amps generally ignore) could have been the triggering issue...still...my tube amp sounds simply right. Schiit was extremely professional in all stages of this saga, and I own 2 of their headphone amps and a Loki (plus the Freya) and they all work amazingly well.