Yes the bass. I have the 900's also, and have never heard any Audeze products. I agree that it is most definitely in the same league as the Th900's, I would even go so far as to say that it might be considered in its own league, all by itself, in my listening experience.
Natural is most certainly the word, creamy bass, it pours onto your ear drums rather than hits them.
I would consider myself a lover of bass, these never distort, ever.
Indeed when listening to the 1plus2 it often feels as if the sound waves are like a drop of water landing in a glass of water rather than on a hard surface. I really get that image of wavelet dispersal, that is what it sounds like to me.
Including the bass. I find it has energy also, though I could talk a lot about the timing of the earphones and how they seem to have that nailed, which is what is peaking my interest more with this talk of cables, as I am starting to think that timing could easily be improved with better conductors.
Interesting also that you mention not too much and not too little, whereas I would consider them to be quite bass heavy, but that could be a relative illusion, seeking it out, if I am satisfied, I will of course label them as bass heavy.
Either way, it is gorgeous, and I can't find it anywhere else, not in anything I have listened to ever in my life.
So I would rank these currently as best bass ever, however I do remember clearly moaning to Gavin about the lack of it before I got a proper seal.
I am also hoping that perhaps new cables will stay in the units more, could go either way I suppose. I want to return to using these on the go.
The bass is what I keep coming back to 1p2, I was hoping to find something to match the TH900 and I have found it, after going around many IEM. On top of that, the 1p2 has the kind of extended treble that suits me so well. So here I have the winner IEm in my hands. I do agree with you, once you heard this 1p2, its very hard to find another IEM to match this kind of quality.