I have been listening on and off, all afternoon and evening, to the Hex /LAu /Abyss.
The Abyss takes time achieving a fit/ sonics correlation. It is actually rather finicky, and I think all preconceptions of achieving a seal with the cups has to be thrown out of the window. The cups just need to rest on the ears with a light pressure. Once this is achieved the comfort levels are really good with the weight being evenly distributed by the leather band.
You will know when the Abyss is dialed in. At this juncture, I am reluctant to talk about the sonics as both the LAu and the Abyss needs some burn in.
However, I would like to briefly mention the bass response of the AB-1266. It is like no other headphone that I have heard. It is easily the best reproduction of the lower frequencies that I have heard with any headphone. The viceral impact the Abyss achieves is mind blowing, the resolving nature, detail, attack and slam are at a level that is mesmerizing.
Even at this early stage of ownership, I know for definite that I have in possession a headphone that is moving the boundaries in terms of sonic excellence. Over the next few weeks I will make comparisons with my other headphones and post accordingly.