The Beyerdynamic DT 990 Pro is a popular pair of open-back studio reference headphones for mixing, mastering, and critical listening.
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beyerdynamic DT 990 Pro 250 ohm Over-Ear Studio Headphones PRO X M90 Side Addressed Condenser Microphone and EDT 990 V Ear Pads for DT 990 Pro 250 (Bundle) : Musical Instruments
Bundle Includes: Beyerdynamic DT-990 Pro Acoustically Open Headphones (250 Ohms) and Knox Gear Compact 4-Channel Stereo Headphone Amplifier with 12VDC
beyerdynamic DT-990 Pro Acoustically Open Headphones (250 Ohms) and Knox Gear Compact 4-Channel Stereo Headphone Amplifier Bundle (2 Items)