Wow, you guys must really wear cans ALOT! I purchased 8 sets of AKG K240s phones in about 1993 or so for use in a portable listening setup for automotive sounds. Over the 15 years I worked at that location, while some pairs sprouted legs, not a single set of earcup pads wore out.

The 's' model were closed back, had two drivers per cup, and had the switch I mentioned above.

I don't believe that they sell that particular model any longer.