Two Vintage AKG Headphones: K240 Sextett and K340 Electrostatic Dynamic | Stereophile.com
K240 studio | DIY-Audio-Heaven
Amazon.com: AKG K240 STUDIO Semi-Open Over-Ear Professional Studio Headphones Include a Removable Cable and Varimotion Technology for Enhanced Bass Response / includes Alphasonik Earbuds : Everything Else