If you will forgive a quick but related sidestep...
https://imracoustics.com/products/imr-r2-red
My IMR R2 Red arrived today. (Just missed the post before xmas ):
VERY interesting comparing it to the Rah's! Just a single driver tuned for the Aten [Closed] Chassis o_0
('The R2 Red offers a isolated version of the R2 Aten chassis with a new 13.5mm Aten driver designed to work exclusively with the closed design')
As Bob says on FB:
" It is very reminiscent of the Aten but it is quite different. The bass is faster and less full due to the nature of the design .
There is less stage than the Aten also. It’s a great iem but the Aten is tough to beat.
I would say it sits above the zenith but below the Aten "
Anyway, OOTB, LOVING them. Quite different to the RAH's - Imagine having a great night out (The Rahs's) then coming back home and enjoying your Top Of The Line Vintage Tube amp system - This is how the R2 RED's sounds. Relaxed, smooth, warm, luscious
Vocals are much more the star of the show than the RAH's - (which give you everything!) Vocals on the R2 seem to be louder and more the focus being more up front in the middle ground, but much more chocolatey smooth than the RAHS's vocals
Interestingly the sound-stage supports the vocals rather than being very wide as with with the RHA's BUT whenever the music itself has a wide sound-stage the R2's will suddenly through stuff out far and wide
The low end is lovely - as described above. It can growl like a Lion!
They are going to be an absolute classic IEM after burn in. Perfect companion to the Rah's and ideal for out and about being closed back and relatively thin (which is one the reasons I wanted them)
Over all, they are a more relaxed easy listen than the Rah's but still displaying the same qualities all be it a more, chocolatey, tube sound...a warm bath at the end of a hard day. They are luscious