I got these earlier this week and I’ve been loving them so far. Listening to them from the magnificent Sonett 2. I’ll do a better write up when I have time but brief impressions thus far: - As others have mentioned, the FR of this headphone isn’t a far cry from the 650. It sounds pretty much like the measurements indicate in comparison - more subbass quantity / extension, less mid bass / lower mid warmth, less upper mids, more treble. - The bass character as a whole is improved over the 650 IMO, it can slam and rumble about as well as any open back dynamic that I’ve heard. Roughly on par with the Focal Clear IIRC - Mids don’t quite have that smooth lush flavor of the 650 and I feel like I’m missing a little bit of detail? I feel like it’s not just FR related; it seems like the driver falls slightly behind in detail retrieval in comparison - The mild treble rise is growing on me. At first it sounded a bit strident coming from the 650 but now I often find myself appreciating the increased clarity and engagement factor. TL;DR - A *slight* v-shape signature applied to the 650s. More dynamic and fun but not as smooth or detailed. Keep in mind all of these differences are minor and it still sounds very close to its brethren. It’s the headphone I wanted the Focal Clear to be, at 1/10th the price. To say it’s a fantastic value is an understatement.