Samson SR850 Semi-open-back Studio Reference Headphones Features at a Glance : 
 
Oversized 50mm drivers deliver extraordinary depth and low-end resolution
Semi-open-back design prevents overwhelming bass, allowing you to hear fine details of your tracks
Self-adjusting headband is both secure and comfortable - great for long listening sessions
 
Tech Specs
 
Type:Wired
Open/Closed:Semi-open
Fit Style:Circumaural (Around the Ear)
Driver Size:50mm
Frequency Response:10Hz-30kHz
Impedance:32 ohms
Connectivity:1/8" plug, 1/4" adapter
Cable Type:Straight
Cable Length:8.3'
Color:Black
Material:Velour Earpads