OK, these things are really rocking now.
Many more positions and tweaking. I came back to my position last night, with contact above my ear against my glasses, and really floating over my ears, minimal contact.
And the top frame swivelled inwards about 4-5°. Damb the soundstage is HUGE, cavernous, I can sit in it and be lost, like a massive cavern 100 feet deep and 500 feet wide, with musicians floating around the space. It is truly a breakthrough headphone this thing.
It reminds me a bit of the Jecklin Float, but without the hollow suckout and low bass issues.
Compared to my LCD4, I still love that HP and have a well established soft spot for it. It is more intimate, calmer and warmer, like a jazz club, a big leather sofa. It has it's place for sure. The Abyss has more insight to the event, masses of information and texture, no harshness or noticeable peaks or troughs. I have my DAC feeding the V281 amp via Roon, with no DSP. On the LCD4 I used the Audeze DSP and added +1.5 at 4-6K. The Abyss is basically straight through. This in turn removed a loss using DSD and it is not a free lunch, some SQ is lost. The bass on the LCD4 is the thing, it is centre stage. The mids flow well into it, and it's treble is lower energy and more recessed. Detail is there, but it is harder to follow. This in turn emphasis the bass and it takes over slightly. There is a place for that signature, and it is super forgiving on lower quality sources. I can't tell until I get the Abyss hooked up to my main DAC and Genus amp, but I get the impression it is scaling really well. For example some tracks really pop out from others, i.e.e there is another level of joy I haven't heard yet. This makes me think the Abyss will take off on my Genus tube amp, give it more to work with and a great match. Tube treble has always done for me. My DAC I am using now is tubed output R2R, but is well below my Kassandra DAC.
The speed of the Abyss matches my Stax 009, and am 100% sure of that. But the way it plays is very un-stat like, it doesn't have the floaty ethereal treble of the 009 which I never got to grips with totally. In other words, I am more convinced by the Abyss, the illusion is more complete, less hi-fi.
So, a happy bunny. The fit is a bit of a new aspect, even though I have owned Stax for 25 years, and planers and others for 5 years. The fit thing is well worth the effort. It may put some newbies off, and bug others. But a bit of patience pays of big time. Well done Joe and the guys at JPS Labs. I can't imagine getting beyond this level of performance with anything else, even the HE-1.
Off to Can-Jam tomorrow, too much fun being had.....