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Beyerdynamic Headphones: DT Professional Series DT 770 Pro, DT 990 Pro, DT 1990 Pro – MusicPlayers.com
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Amazon.com: Beyerdynamic DT 770 PRO 250 Ohm Over-Ear Studio Headphones for Professional Studio Mixing Consoles and Audio Interfaces Bundle with Blucoil 4-Channel Headphone Amplifier, and 6' 3.5mm Extension Cable : Musical Instruments
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