The Wagnus Epsilon S completely rocks. It is on a different level altogether from any portable amp I have ever tested. The tube buffer takes it a level up in terms of musicality.
I have owned and sold the Tralucent 1plus2 and Ref.1 (with Uber cable) because of ergonomic issues; I could never get a secure fit with them. Had thought maybe my ears were abnormal until I read the review on Headphonia.
"And that is the 1Plus2’s major gotcha. Keeping it in place, and comfy, is tough stuff. And even when it gets where it’s supposed to be, it has to be situated and re-situate it every five or ten minutes. The cable is nice. The sound is freaking heaven. My god, the sound is heavenly. As said above, it’s more of what the Grado GR10 does, and a lot of that, better. Its accessory kit is good and its packaging so much better than the competition from the region. But it’s a bugger to use in portable kits unless you are absolutely devoted to a philosophy which I consider ridiculous. That philosophy? Best-sound-and-damn-everything-else."