Valkyria and orchestral, a special spot in the hall
When I decided to purchase the Valkyria, their performance on large scale orchestral works was not among my priorities, as I had that base well covered by the AB-1266.
I like the AB-1266 nearly to the point of fanboysm, and their capability to render large scale venues like concert halls or even outdoor productions is one of their strongest assets. They project a big, out-of-your head soundstage that, while being very wide, is also deep, cohesive, atmospheric and well organized.
As for timbre, a stock 1266 is - to my ears - a bit lean in the midrange / lower treble area, which sometimes, especially with dry-ish recordings, makes the string section sound borderline harsh, unengaging. The Superconductor cable, a synergistic amp like the AIC-10, especially paired with a euphoric tube like a NOS Mullard balanced out things pretty well for me. You won't get Susvara-like midrange, but still ...
The take of the Valkyria on orchestral works is very different from the Abyss (and even more SR1a) open, crystal clear, transparent and finely chiseled detail portrayal.
The soundstage is less wide and, on a quick swap, the sense of wearing headphones is definitely more apparent, with an almost muffled initial feeling.
But, as my ears and brain adapt, a rewarding experience is awaiting. The thicker, less airy sounds adds weight to the notes, making the whole string section of the orchestra seem more authoritative and meaty.
The attack and decay is less swift than the 1266 and SR1a, but has a heft to it that makes - for example - the percussions on the first movement of this album way more satisfying.
The slightly bass-prominent signature, combined with the Valkyria capability to render explosive dynamics in the most effortless way, projects a full-blown orchestral mass at you with a density of energy which is unknown to the 1266 or SR1a (or any other headphones I have owned). Both can slam hard, but the airwaves come at you as a big, soft bubble supported by the sub-bass (Abyss) or a dry punch shot (SR1a), whereas the Valkyria in comparison is like a solid, compact wall of sound.
Take this recent recording of the Beethoven 7 for example. With the Abyss, the size of the hall seems larger, the resonant character of the environment is better defined, it is very easy to visualize the various sections - or even the various elements of a section - in space.
With the Valkyria since the very first notes you are grabbed by your guts, and connected with the immediate, emotional and physical side of musical experience, where the brain and its analytical activity is less relevant.
So, is the Valkyria more realistic or better than Abyss or SR1a at orchestral music?
Not quite, as depending on the recording or the composition or just the mood of the day, I may prefer the one or the other.
It is more like listening to the same performance in a different hall (more diffusive with the V., less dry), or in a different spot in the hall - closer to the first row, or perhaps with a different personal approach, closed-eyed and emotionally receptive rather than an investigative, intellectually active attitude.