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Amazon.com: Audio-Technica ATH-M40x Professional Studio Monitor Headphone, Black, with Cutting Edge Engineering, 90 Degree Swiveling Earcups, Pro-grade Earpads/Headband, Detachable Cables Included : Audio-Technica: Electronics
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Audio-Technica ATH-M40X Professional Monitor Headphones - Canada's Favourite Music Store - Acclaim Sound and Lighting
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Audio-Technica Comparison: M40x, M50x, M60x, M70x – Can They All Be Used as Studio Headphones? - Major HiFi
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