![Archimago's Musings: RETRO: Beyerdynamic DT 990, 600Ω, classic open-back circumaural headphones (circa 1991). Archimago's Musings: RETRO: Beyerdynamic DT 990, 600Ω, classic open-back circumaural headphones (circa 1991).](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxmSVROnUIfNvU9TTLTkOsxLQ5UYGFwSYlGhsVOBVDLlCBcf4DXmL_EOPtAgs73FpPMxvwcBhwJ2Kfi0Ax_v--udNIC0S3BSD8XItdx9d5on8SDzL8RgMVqycbdszS-kv9WFDLzEcGSYtn1CiOdfvGFLBWLFloeFlW8SwmR37s9GaDH5I71I8aesuZ/s1700/Beyerdynamic%20DT%20990%20-%20Headphone%20with%20Original%20Box.jpg)
Archimago's Musings: RETRO: Beyerdynamic DT 990, 600Ω, classic open-back circumaural headphones (circa 1991).
![beyerdynamic DT-990 Pro Acoustically Open Headphones (250 Ohms) and Knox Gear Compact 4-Channel Stereo Headphone Amplifier Bundle (2 Items) : Amazon.sg: Electronics beyerdynamic DT-990 Pro Acoustically Open Headphones (250 Ohms) and Knox Gear Compact 4-Channel Stereo Headphone Amplifier Bundle (2 Items) : Amazon.sg: Electronics](https://m.media-amazon.com/images/I/71IB9KNugeL._AC_UF1000,1000_QL80_.jpg)
beyerdynamic DT-990 Pro Acoustically Open Headphones (250 Ohms) and Knox Gear Compact 4-Channel Stereo Headphone Amplifier Bundle (2 Items) : Amazon.sg: Electronics
![Beyerdynamic DT 990 Pro 80 Ohm Open-Back Studio Headphones Limited Edition | Derringers Music Australia Beyerdynamic DT 990 Pro 80 Ohm Open-Back Studio Headphones Limited Edition | Derringers Music Australia](https://derringers.com.au/media/catalog/product/cache/b5f4767d30097bb5f08b6ba5ef383af0/b/e/beyerdynamic-dt-990-pro-80-ohm-open-back-studio-headphones-derringers-music.jpg)
Beyerdynamic DT 990 Pro 80 Ohm Open-Back Studio Headphones Limited Edition | Derringers Music Australia
![Beyerdynamic DT1990 PRO Open-Back Studio Reference Headphones | Studio / Monitoring Headphones - Store DJ Beyerdynamic DT1990 PRO Open-Back Studio Reference Headphones | Studio / Monitoring Headphones - Store DJ](https://www.storedj.com.au/images/ProductImages/500/BEY-DT1990PRO.jpg)