The Sennheiser HD 400 PRO are a pair of open-back headphones designed to give you a completely neutral pure sound thats perfect for mixing and mastering. As youre working on music its important that you hear it as accurately and evenly as possible to get the best sound you can out of it. Enter the HD 400 PRO the perfect pair of headphones to help you make clear professional mixes thatll translate naturally to any system. Its comfortable natural fit and velour earcups make them ideal for long listening sessions so no matter what youve got to work on from a big single to a full-length album you can keep working all day without any discomfort. With sound provided by its custom-designed 120 angled transducers and a specially developed polymer blend in their diaphragms the HD 400 PRO are meticulously built to provide clear accurate sound with absolutely zero distortion at high volumes improved stereo imaging and deeper sub-bass that isnt over-emphasised. Precision engineering for precision monitoring. Robust external materials ensure that the HD 400 PRO are a pair of headphones that you can rely on no matter what. [grid] no-image Accurate neutral sound The Sennheiser HD 400 PRO provide an accurate sound profile that gives you the opportunity to hear absolutely everything clearly. Exactly as you want to find with any set of headphones for mixing the HD 400 PRO are as flat-sounding as possible so you can be assured that everything you hear is completely accurate. Whether youre trying to find problem frequencies to cut out of your mix or trying to enjoy your favourite album the HD 400 PRO will not lie to you about whats really in your signal. no-image Fatigue-free listening Its all too common to reach a point where you can no longer make sense of what youre listening to over headphones. Whether youre mixing mastering checking out reference tracks or relaxing with some leisurely listening its all too easy to reach the point where you feel overwhelmed. With Sennheisers ergonomic and open-back design however you get not only premium accuracy but comfort and easy listening over the course of long sessions. Articulating earcups velour earpads and an adjustable headband give you all the flexibility to get the perfect fit for your head so you can buckle down and listen for as long as you need to get the job done with total comfort. [/close] Reviews “In short then the HD 400 Pros are exactly what a ‘pro audio’ product should be. The overriding sense you get from them is that the development and manufacturing budget has been spent not on cosmetics or accessories but where it matters — on the sound. Try these and you may not feel you need to spend more.” Sound On Sound (read the full review) FeaturesA pair of flat accurate monitoring headphones ideal for audiophiles and professional audio engineers Neutral accurate sound built for highlighting every detail of your mix High-efficiency driver magnet provides ventilation for deeper bass without distortion Angled transducer design gives accurate sound and improved stereo imaging Lightweight construction and velour earpads for comfortable fit through long-term listening sessions Open-back design helps prevent ear fatigue over long periods of time Included straight or coiled cables for your choice of connection and freedom of movementSpecificationsAcoustic Principle: Dynamic Open-Back Ear Coupling: Circumaural Ear Pad Material: Velour Jack Plug: 3.5 mm jack with 6.3 mm adapter Impedance: 120Ω Frequency Response: 6 Hz – 38 kHz (-10 dB) Sound Pressure Level: 110 dB (1 kHz/1V RMS) Total Harmonic Distortion: <0.05% (1 kHz/90 dB SPL) Weight (without cable): 240 g Temperature Operation: -15°C to 55°C (5°F to 131°F) Storage: -55°C to 70°C (-67°F to 158°F) Relative Humidity: ≤90% Product Code: 700047