Amazon.com: Premium Ear Pads Compatible with AKG K550 K551 K553 (MKII and MKIII Models as Well) Headphones (Black). Premium Protein Leather | Soft High-Density Foam | Easy Installation : Electronics
K550MKII | Closed back reference class headphones with amazing comfortable fit.
AKG K550 MKIII Now with detachable cable! : r/headphones
AKG K550 MKII Premium Geschlossener Hochleistungs-Over-Ear Kopfhörer mit 2D-Axis Faltmechanismus und AKG-Referenzsound mit Geräuschisolierung Kompatibel mit Apple iOS und Android Geräten - Schwarz: Amazon.de: Musikinstrumente & DJ-Equipment
The AKG K550 Impressions and Discussion Thread! | Page 178 | Headphone Reviews and Discussion - Head-Fi.org