Hmm, maybe a bit of both? It's hard to say without frequency measurements specifically. The treble contributes to it, and maybe there might be a very slight midbass lift? But again, they are very linear overall. Wish I'd heard the other hifimans to give a relative comparison, but looking at the graphs for the HE1000 V2, the linearity seems about right. I know warm is a bit of a vague term, but I do think it's a useful one. For some more context, I think bright headphones can often be annoying with bad recordings. The Arya have the detail to reveal bad recordings, but I don't think they become unlistenable with some poor modern recordings because the treble energy isn't so in your face. They do as well with poorly mixed modern recordings as they do with audiophile Staples. But also don't want to exaggerate their warmth. I just think they're easy to listen to, and the bass surprised me the first time I heard them. They move quite a bit of air.