Still crossing my fingers, one day us europeans can pick up this headphone too without having to ship over seas.
This line intrigued me a lot as I've been searching for a M-Audio Q40 replacement that I've been using forever, so far the the Ultrasone Signature X comes closest that I'd currently use if this Q40 snaps on me (it's a lot of plastic as far as the headband part goes so it's just matter of time). The Signature X with the new bigger default pad is bassier than Q40 but the Q40 has a better "slam" or dynamics or how you'd picture it, it really gives life to kickdrums the way I feel the kicks, not just hear it. The Ultrasone also delivers on the "feel" part but it delivers with slightly less finesse with cost on the rest of the sound as the Q40 does it with more transparency, it seems hard to find this kind of impact versus not hearing the bass (but just feeling it). The Q40 I use for mastering EDM music as well as it sounds balanced in the highs and mids to me just the way I personally like it and the feel to the bass just makes it easier for me to dial in the right amount bass as I typically start feeling it when the amount is just about right, like I do with 99% of retail released major record releases. The imaging is also another aspect I'd rate Q40 higher than Signature X, the Signature X has very wide soundstage but not the very best imaging but I feel Q40 having more rounded sphere to the soundstage, limiting the stereo width on the Signature X to 98~99 from default 100 on the RME ADI 2 fs DAC is actually preferable as I prefer that more rounded soundstage that sorta gives the illution of better depth, not many closed headphones give me good sense of depth but often a rather wide soundstage, oval-shape that my mind doesn't comply with that well.