Mine are 589 grams without cables. My understanding is they use a smaller driver and have a smaller form factor than some Audeze but I have none to compare. I find them very comfortable in comparison to my Eikon, for example and the clamp force is adjustable in much the same way. In the live stream with Resolve, Alex Rosson said that they switched to aluminum fairly early on in their production runs, so I think the standard configuration is lighter than when they were initially launched and reviewed. I am writing some more comprehensive impressions to post later in the RAD-0 thread.