The Sennheiser HD 400 PRO open-back studio headphones deliver neutral, precise reference sound for mixing and mastering. Lightweight with velour pads, 120Ω dynamic drivers, angled transducers for wide soundstage and dual cables (straight + coiled) ensure comfort and accuracy during long sessions. The Sennheiser HD 400 PRO is a professional open-back studio reference headphone engineered for critical mixing, mastering and monitoring in home or professional studios. Its 120Ω dynamic transducers, angled for optimal ear alignment, reproduce a wide, transparent soundstage with low distortion even at high SPLs (110 dB), ensuring your mix translates exactly as intended. The lightweight, open-ear design with soft velour earpads provides exceptional comfort over extended sessions, while the open-back architecture enhances spatial accuracy and natural ambience. Included are both a single-sided coiled cable for studio mobility and a straight cable for portable use, both terminating in a 3.5mm plug (with 6.3mm adapter).Key Features:Neutral, accurate sound reproduction for professional mixing and masteringOpen-back design with angled 120Ω dynamic transducers for spacious, low-distortion soundstageLightweight construction with velour earpads for all-day comfortDual cables: single-sided coiled (for studio) and straight (for travel)High SPL handling (110 dB at 1 kHz / 1 V RMS) with minimal harmonic distortion3.5 mm connector with 6.3 mm adapter includedDurable, professional-grade build for daily studio useSennheiser HD 400 PRO Studio Reference HeadphonesCoiled CableStraight Cable1/4" AdapterModel: HD 400 PROType: Open-back, over-ear studio reference headphonesTransducer Type: Dynamic, 120 Ω impedanceWearing Style: Circumaural (over-ear)Connection: WiredConnectors: 3.5 mm stereo jack (with 6.3 mm screw-on adapter)Cables Included:1 x single-sided coiled cable (3 m)1 x straight cable (1.8 m)Max Sound Pressure Level: 110 dB (1 kHz / 1 V RMS)Frequency Response: 6 – 38,000 Hz (typical for precision monitoring)Ear Pads: Soft velour, replaceableWeight: Approx. 240 g (without cable)Color: Black