The Shure SRH840 Reference Studio Headphones have been specifically engineered for critical listening and professional recording. With its precisely tailored frequency response it delivers rich bass, clear mid-range and extended highs.The SRH840 also provides an ergonomic fit and collapsible design for comfort and portability. The closed-back design provides optimal sound isolation whilst the adjustable and wide padded headband provides superior comfort over extended periods.The collapsible design makes the headphones easy to store and to take with you. The headphones come with a carrying bag, additional pair of earpads and threaded 6.3 mm gold-plated adapter.Avoid using headphones with the volume turned up for an extended period of time. Doing so can damage your hearing. It is advisable to keep the volume at a moderate level at all times. For your own safety, please do not use when driving or cycling.Transducer type: Dynamic, neodymium magnet
Driver size: 40mm
Sensitivity (1kHz): 102 dB/mW
Impedance (1kHz): 44?
Max. input power (1kHz): 1000mW
Frequency range: 5Hz ? 25kHz
Net weight (without cable): 318g
Length of cable: 3m detachable and coiled Plug: Gold-plated 3.5mm stereo mini plug