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Shure introduces new professional comfort-fit headphones that minimize background noise and provide an excellent sound quality. Shure SRH240, 440 and 840 models feature total ear coverage for background noise minimization, durable design for everyday listening but also perfect for studio recording. The SRH240 headphones from Shure provide great sound reproduction and comfort. With 40mm neodymium dynamic drivers optimized for general listening and monitoring, the SRH240 reproduce deep bass with clear mids and highs. Impedance, power handling and sensitivity are all calibrated for connection to most consumer and professional audio devices. In also includes threaded ½'' (6.3mm) nickel-plated adapter. The SRH440 Professional Studio Headphones from Shure provide exceptional sound reproduction and comfort. Optimized for home and studio recording, SRH440 headphones reproduce accurate audio across an extended range. Impedance, power handling and sensitivity are all calibrated for professional audio devices such as DJ mixers, mixing consoles, and headphone amplifier. Includes carrying bag and threaded 1/4" (6.3mm) gold plated adapter. Designed for professional audio engineers and musicians, the SRH840 Professional Monitoring Headphones from Shure are optimized for studio recording and critical listening. A precisely tailored frequency response and 40mm neodymium dynamic drivers combine with total comfort and durability to provide the ultimate listening experience. The replaceable cable and included set of replacement ear pads ensure a long-lasting lifetime of use. Also includes threaded 1/4" (6.3mm) gold-plated adapter. Specifications: - transducer type:         - SRH240, 440, 840 : dynamic neodymium magnet - driver size:         - SRH240, 440, 840: 40 mm - sensitivity (1kHz):         - SRH240, 440: 105 dB/mW         - SRH840: 102 dB/mW - Impedance (1kHz):         - SRH240: 38 ohm         - SRH440: 44 ohm         - SRH840: 44 ohm - maximum input power (1kHz):         - SRH240: 500mW         - SRH440: 500 mW         - SRH840: 1000mW - Frequency range:         - SRH240: 20Hz – 20 kHz         - SRH440: 10 Hz – 22 kHz         - SRH840: 5 Hz – 25 kHz - Net Weight:         - SRH240: 181 g         - SRH440: 181 g         - SRH840: 317.5 g - Length of cable:         - SRH240: 2 m         - SRH440: 3 m         - SRH840: 3 m - Type of cable:         - SRH240: attached straight oxygen-free copper         - SRH440: detachable coiled oxygen-free copper         - SRH840: detachable coiled oxygen-free copper - Plug:         - SRH240: Nikel-plated 1/8 (3.5mm) stereo mini jack         - SRH440, 840: gold-plated 1/8'' (3.5mm) stereo mini jack - Accessories:         - SRH240: replacement ear cushions; threaded ¼'' adapter, carrying pouch.         - SRH440, 840 : replacement ear cushions; threaded ¼'' adapter, carrying pouch, replacement cable