I’ve yet to hear any headphones by Abyss. Honestly, I’m turned off by their apparent lack of comfort for all their models and I think they’re overpriced for the technology that’s inside of them.
I've heard the Abyss Phi and D8000.
The Phi sounds great, but is not a contender for me because it's too ugly, too heavy and too fiddly to adjust to get best sound and acceptable comfort. It's also fairly inefficient, so fussier about choice of amp..
On the first occasion, the D8000 sounded great, rivalling the Phi, but with a FR tilted in favour of the bass, which some people will love and some not. On the 2nd occasion at a noisy meet they didn't sound at all good, but that could have been due to other variables. They are also farly heavy, have rather average comfort, and don't look anywhere near as good as the Empyreans. I'd still give them another try though because of that first listening session.
I've also tried Diana, but found the thin pads to be very uncomfortable. The new Diana Phi has much fatter pads, which may have solved that problem, but I haven't tried that.
I just need to hear a production version of the Empyreans in quiet surroundings before making a final decision.
To the persion that recently asked about colour, Meze have previously stated that they will build in batches, with the first batch being black, which looks very smart in real life. They haven't stated what the second batch will be, but I'd love to see the copper version in real life.