So, I must say that the tuning of the on1 is pretty impressive. I found them fairly balanced with slight bottom end enhancement, but with good texture and punch. Mids have enough warmth to make them very easy to listen without fatigue and has a lot of energy in them. Highs are nicely detailed with a touch of sparkle, but I prefer a little brighter upper end that comes from the Beyerdynamics DT1350. These sound really good out of the box. About the only thing that I would want is a little more stage depth and width, but I've come to conclusion that they don't exist with closed, super-aural headphones.
Sadly, my ears don't play well with super-aural headphones. Right around the 15 minute mark, my ears started to feel sore and I had to take them off. Other than that, the headband comfort and clamp tension was spot on for my large noggin. Any fears of dawning a headband with NAD like imagery can be put to rest. The no frills, minimalist, zero plastic materials in the packaging is commendable.
I was hoping that these would be keepers and they are sound-wise, but for long term comfort - a no go. If Thinksound ever comes out with full-size version of these, you can count me in on the buy-it train. Anyone is looking for a good deal, mine is available in the FS forums.
Edited by alpha421 - 12/24/14 at 9:44am