I've been looking at this HP recently and I've noticed that some site spec it as semi-open and some as fully open
Are there two versions of this headphones?
And if not, which one is it?
Regardless of what the "marketing folks" say, these are open headphones and leak accordingly. Kinda like semi-pregnant.
Yeah, but I think they leak less than the K702. You can check this on Headrooms page somewhere.
Yep, just due to some silly foam behind the mini grill (that the K702 doesn't have).
I think the HD-598 actually leaks sound more than my Q701!
Yes, there is foam behind the driver. They are still open, but this may be why AKG sometimes calls them semi-open. They do not isolate and they do leak, so they are open.
I see, thanks for clearing that out.