More info here. They look promissing: No bumps on the soft leather headband and low-end performance improved by 3dB. 

Hi guys, this is my first post here after two weeks of busy reading threads about Audio-GD products, K701/2 vs HD650 hp and burn-in process. At the beginning I just wanted to buy better headphones and a friend of mine recommended AKG K701 to me. Wanted to find out more about them with...