So far, only tdockweiler found the srh940 "somewhat warm". But I guess it would depends of what "warm" means. The treble is not recessed, so that's not that.
The SRH-940 is one strange headphone to me to describe. I've rarely had a headphone that's a mix of something bright and analytical yet somewhat warm and very full and textured in it's mids. How the heck does that work? The only thing that reminds me of this sound was the Audio Technica ATH-AD2000.
SRH-940 seems like a weird combo of an HD-600 and a poorly amped K702. Something brighter and energetic and fairly laid back and warm, like an HD-600.
One thing I noticed is that the SRH-940 sounded much worse (and not as warm) without an amp. With my setup, the SRH-940 sounded a tiny bit less warm than my HD-598!! The Micro Amp loves the SRH-940 and the Airhead should offer a similar sound (maybe). The Micro Amp is slightly warm, but not enough to ruin something like an HD-650.
I don't know if it's just me, but the SRH-940's sound seems to change a lot with different amps/DACs. Even more than my HD-598.
BTW I also think the SRH-840 is warm too But I guess this makes more sense. I didn't really realize this at first until I compared it to my DJ100 and the KRKs. Then it's very noticeable. I generally hate headphones that are too warm. HD-598 is the warmest headphone I can stand I think. Maybe the HD-600, but that headphone bores me to death. Not that it's bad.