Yeah both are great tubes. Upon having placed the Mullard tubes in, the worst of the mid bass has gone, which is a step in the right direction and reminiscent of some Amperex ECC88's in my Lyr 2 (which I love).
I did used to have a set of Tungsram 6922 tubes that I used in a Mjolnir 2 a while back. Dan Clark recommended them to me specifically for EDM. I have just ordered this identical looking pair of tubes - https://www.ebay.co.uk/itm/264963016380 .
To be honest, I'm not really interested in pad rolling. I'd rather get as close to what I'm looking for in the headphone without resorting to pad rolling.
Yes the way you have described the mid-bass is exactly what I'm trying to articulate. I also have to turn the volume down on the Echo to stop my hears from hurting after 30 mins or so of listening.
I had HD650 many yrs back and didn't like it (felt it was thin - which I appreciate is not how most would find it), though for a while I did enjoy Philips Fidelio X2. So, I've had mixed experiences with open HPs.
Atticus is good for music like this at low volumes (Clem Leek is a favourite of mine) - https://music.amazon.co.uk/albums/B...002803JQC&ref=dm_sh_8817-4ee0-df98-ce52-61de7
But not so good for me with stuff like this (too intimate, not resolving enough, decay far too long, lacking in "slam" with regard to sub bass) - https://music.amazon.co.uk/albums/B...07CPRG7CW&ref=dm_sh_92d7-97ce-796b-fa72-525f0
On the Chicane track with the Primes, the sound stage is wider, and the music just kind of dances around you - it's quite holographic.
I typically favour closed HPs for electronica/EDM/trance/house, but in a way I feel about Atticus a little like I did about Denon D2000 in terms of bass and fatigue.
If you find the mids too warm/fuzzy - even though I realize you don't want to pad roll, you'd really be missing out if you don't try the universe pads. The will bring the ear closer, make the sound faster, and lessen the "boom" and thickness in the lower mids. Changing the pads isn't too hard, my intended use in designing different earpads is to give different presentation suited to each user's preferences.Yes - I find the Atticus mids too much to the point I have to have the volume on really low or my ears ache - and yes compared to Prime the mids seem fuzzy and congested. I also feel that the primes are faster (I guess less decay) and Atticus is almost lazy by comparison with EDM. I can listen to any genre on the Primes, and they are almost spot on (could do with a little more sub bass) with all genres, whereas with Atticus, I only really enjoy with Acoustic music (which I don't listen to anywhere near as much as EDM/Trance/House or pop). I think the Primes have a little lushness to them which I really enjoy, and Atticus to me is dryer.
From what you've said, I think the VO or VC are most suited to me. I certainly wouldn't wish to go any cooler than Prime, so Auteur is probably out on that basis - although I do appreciate what you are saying in terms of matching the warmth of the Echo.
I'm certainly interested in knowing what the Verite open is like, which I hope would complement the Primes nicely (I doubt I'll ever sell the primes).
This is the kind of music I adore with the Primes (track is called Quiet Earth) - https://music.amazon.co.uk/albums/B...003C73OYW&ref=dm_sh_44c3-93ca-b7cb-a653-2171e
Edit: It may be worth mentioning that I'm using Prime with Lyr 2 and Modi Multibit, which is quite different to Modi Multibit & Echo for use with Atticus.