Benchmark for Total Audio Immersion With balanced acoustics, the Sennheiser HD 650 Stereo Headphones offer a total sound immersion thanks to its advanced sound performance. It offers extremely tight production tolerances (± 1 dB) and handpicked components with an exclusive 42 mm transducer and 38 mm diaphragm that ensures overall treble and low-frequency presence are effortless while the midrange is reproduced with lifelike composure. By lowering variances between left and right channels, the Sennheiser HD 650 optimum sound performance is independent of room acoustics or loudspeaker positioning. Sophisticated Design that is Built to Last For audiophiles, the frame and design of the Sennheiser HD 650 really stand out. From the velour pads to the earcup grille pattern, each component of this headphone was crafted to guarantee a next-level personal sound experience. For the hi-fi enthusiast that prioritizes engaging sound quality, the HD 650 is an instant upgrade. Fatigue-Free Listening It can be pretty annoying to use a headphone when listening to music for long hours. But with the Sennheiser HD 650, it is different. This headphone offers fatigue-free listening thanks to its uniform attenuation over the entire area of each ear-cup. It is also comfortable to wear with its elliptical design, which naturally adapts to the shape of the ear. The lightweight aluminum voice coils ensure a remarkable transient response, while the full-range drivers offer a frequency response of 10 Hz to 39.5 kHz. Connect for Elevated Audio Experience The HD 650 from Sennheiser uses a 9.8’ detachable cable made from a highly conductive OFC copper with low handling noise and low structure-borne sound sensitivity. It can be used with high-output mobile devices and excel with high-quality stationary hi-fi components, such as SACD, DVD-A, and CD players. The HD 650 includes a detachable cable and 1/4" to 3.5mm adapter. - Sennheiser HD 650 Reference Class Stereo Headphones