I have been a very happy original owner of an ARC 150 SE since 2017. Everything is is context, and pairing it with an ARC Ref 6 and using Cardas Clear Beyond XLR IC helps to get the best out of it. I have 1300 hours. Not a hiccup so far. This amp has "balls" and yet retrieves inner detail and creates a finely woven soundscape. I have never fallen asleep while listening no matter how fatigued. Back in my solid state days I used to routinely fall asleep while listening. No alcohol, no narcolepsy, just a soporific sound character.