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Amazon.com: beyerdynamic DT 990 PRO 250 ohm Studio Headphones (Ninja Black, Limited Edition) with 4-Channel Headphone Amplifier Bundle (2 Items) : Electronics
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Amazon.com: beyerdynamic DT 990 Pro 250 Ohm Open-Back Studio Mixing Headphones Bundle -Includes- Soft Case, Headphone Splitter, and More : Electronics
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