Jotunheim 2 or Adcom GFA 535? The jot2 has been on for 8 days and this has helped with a slightly smoother presentation. The Adcom has been on over a month. Listening to Vanessa Fernandez, I Want You, as I write this and finding the Jot to be more truthful, I think. Guitar distortion and vocal imperfections seem more lifelike vs the Adcom, outresolving it and providing more clarity. I am happy with both amps with this headphone. You'd have to give the nod to the jot2 for headphones, the HD800s sounds excellent, still comparing vs ZDS and SW51+ along with Verite, HD650, Grado RS2e, Verum and Elegia, jot 2 is just more versatile. The Adcom stays as a backup for phones and speakers. Loxjie P20 and Neurochrome HP1 seem redundant now along with the Crack but I do have to give more time to the HP1. It won't do for the he6se but performs well with other phones.