akgfan: is 26 mm the exact measure of the K242 HD and K530 drivers? Judging from the AKG manuals it should be the XXL driver, but it's not exactly big. Maybe the AKG engineers have a weakness for irony.
The picture a few posts back is from my AKG K3 manufactured in the beginning of the 1980s. Diameter 27,5 mm. This is how it looks from the back:
It's only 7 mm thick and, as you can see, fairly open.200 ohms.
Edited by MDR30 - 5/21/12 at 9:35am