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Beyerdynamic DT 1990 Pro Open-back Studio Reference Headphones and Knox Gear Compact 4-Channel Stereo Headphone Amplifier with DC 12V Power Adapter Bundle | Reverb
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Amazon.com: beyerdynamic DT 1990 Pro Open Studio Reference Headphones 250 Ohm Bundle with Hard Case, 1-Year Extended Protection, and Headphone Stand : Musical Instruments
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Beyerdynamic Headphones: DT Professional Series DT 770 Pro, DT 990 Pro, DT 1990 Pro – MusicPlayers.com
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