To hell with you people and your modern AKG K240 variants and knockoffs,
vintage K240 knockoffs are the way to go!
Here's my newly acquired, like-new-in-box, Philips N6330, an OEM of the K240 Sextett.
These are in almost perfect shape; the only problem is that the right side badge is missing. Both badges fell off from age, but I reattached the left side one (which was found in the box).
Here they are on my head. Photos don't do it justice; these things are absolutely massive.
Here's the good stuff: the six passive radiators that give the Sextett it's big sound. You have absolutely no idea how hard it is to resist poking them.
These are actually considerably heavier than they look and feel very rugged and durable compared to AKG's frame. The sliders use spring steel instead of elastic bands, which is very nice in the long run, and the headband is a thick, rubbery silicone instead of a pleather strap.
The sound of these is apparently somewhere between the LP and MP Sextett models in regards to the bass quantity. In my opinion, this means just a teeny bit more than what I'd call "netural". Surprisingly competent sounding even out of a lowly laptop. Glorious mids, surprisingly good treble. Colored, but in a very subtle way and not at all polarizing. A bit lacking in bass extension. Soundstage is small but precise, airy and well separated. Comfort is just as amazing as the K240.
A very nice listen and the closest headphone yet to matching my Z7.