Yamaha HPH-MT7 Studio Monitor Over-Ear HeadphoneUPC: 889025101080Styled with black earcups, the Yamaha HPH-MT7 Headphones provide 40mm dynamic drivers with CCAW voice coils that deliver a flat, monitor-grade frequency response of 15 Hz to 25 kHz. These studio-quality headphones sport an over-ear, closed-back design for maximum isolation, though the lightweight 0.8 lb construction, three-dimensional arm-pivoting mechanism, and adjustable head slider facilitate a comfortable fit, one that wont prove fatiguing over long listening sessions.Moveabl