40mm Replacement Speaker Unit Driver for AKG K420 K430 K450 K55 Q460 N60NC Y50 Y500 K92 K72 K52 Y50BT Y30 Bluetooth Headphones|Earphone Accessories| - AliExpress
Old news? Maybe. But if you need to punch holes or shape foam in some way, a leather punch set can be your friend! Pictured: AKG K 55. No, not the K-55, but the K 55. I dont get it either. : r/headphones
AKG K55 Black Lightweight Closed Back Over The Ear Stereo Headphones -D08 | eBay
AKG K55 Headphones, One Side Doesn't Work, Extra Long Cord For Recording, 1/8 Plug, Used But One Side Still Works, Sold As Is, Fair Condition Auction | 1BID