The Beyerdynamic DT 990 Pro 250 ohm headphones are known for their open-back design, robust build, and strong treble response. They are popular for studio monitoring due to their detailed sound and wide soundstage 

Key Specifications:
Type: Open-back, dynamic headphones.
Impedance: 250 ohms.
Frequency Response: 5 Hz - 35,000 Hz.
Nominal Sound Pressure Level: 96 dB.
Weight: 250g (without cable).
Connection: 3.5mm jack with 1/4" adapter.
Designed for: Studio monitoring, detail retrieval, and a spacious soundstage.
Comfort: Replaceable velour ear pads and a spring steel headband.
Cable: Coiled, single-sided cable