A staple in recording studios? These are headphones. I'm not using them anymore, so I'm selling them. The condition shows considerable wear and tear. (Specifically, the headband that rests on your head and the ear pads) I cleaned them as thoroughly as possible with anhydrous ethanol before listing them, but please be aware of the condition mentioned above before purchasing. Also, the plug has been replaced with a Neutrik gold plug. I checked the sound quality and confirmed that there are no problems. - Brand: SONY - Model: MDR-CD900ST - Style: Studio Monitor Headphones - Connection Type: Wired - Cable Length: 2.5m Thank you for looking.