Sennheiser HD 400 PRO

Technical data

• Impedance: 120 ohms
• Audio transmission range: 6 Hz to 38 kHz (-10 dB)
• Sound pressure level at 1 kHz: 110 dB (1 kHz / 1 V RMS)
• Tonal harmonic distortion at 1kHz: < 0.05% (1 kHz / 90 dB SPL)
• Coupling to the ear: circumaural
• Connection plug: 3.5 mm jack plug with 6.3 mm adapter
• Weight: 240 g
• Temperature range (storage): -55°C to +70°C (-67°F to 158°F)
• Temperature range (operation): -15 °C to +55 °C (5 °F to 131 °F)
• Relative humidity during operation: = 90%
• Acoustic principle: dynamic, open
• Ear pads material: velor

Whether at home or in the studio, your mix needs to sound the way listeners will hear it. The HD 400 PRO open studio headphones offer a natural and precise listening experience for fine-tuning your signature sound. Velor ear pads and an ultra-lightweight design provide the comfort you need during long sessions. Open ear cups and angled sound transducers ensure a wide and transparent sound image and make the HD 400 PRO a reliable companion for everyone who puts quality and precision above all else.

Reference-class headphones for project work and professional mixing

The frequency range of the HD 400 PRO has been designed to sound pristine across the entire spectrum, which is particularly noticeable at the lower end. The angled transducer design enables a unique stereo imaging that reproduces the spatial sound of the mix.
In other words: What goes in comes out. Thanks to its playback of analytical audio, the HD 400 PRO reference headphones are the perfect tool for everyday work.

Open design, open mix

The open ear cups ensure a wide and transparent sound image and create the optimal listening position known from high-end recording studios. Confined space artifacts are a thing of the past. These studio headphones do not interpret, but rather ensure neutral transparency - the basis for the best mixes.

Perfect synergy of comfort and precision

Mixing sessions are usually very time-consuming. Thanks to the lightweight design of the HD 400 PRO, you can comfortably concentrate on your project for hours. Movable ear cups, velor ear cushions and an adjustable headband ensure adaptability and comfort and fit perfectly to the shape of your head.
Our self-developed 120 ohm transducers are tuned for accuracy and reproduce every detail of your mix. The highly efficient driver magnet provides clarity while its damping system regulates airflow. This ensures deeper bass while mitigating distortion that would otherwise affect sound quality - a difference that professional users will appreciate.

Versatile tool, versatile options

The HD 400 PRO has a removable coiled cable. A smooth cable is also included in the scope of delivery for a wider range of uses. With a screw-on adapter you can connect your mixer, audio interface or any other audio device with a 6.3mm or 3.5mm output.

Find the sweet spot of your mixing environment

With dearVR MIX, Dear Reality, the immersive audio expert, transforms the HD 400 PRO into a premium stereo studio with carefully designed acoustics - all through advanced spatial audio technology. Gain confidence and create better mixes by adding the AAX/VST3/AU plug-in to your DAW and recording your session in reference studio acoustics or other common listening environments, such as: E.g. in the car. With Dear Reality's unique Spatial Headphone Compensation (SHC) technology, the HD 400 PRO's sound lines remain unrestricted in the virtual studio environment. This provides you with a monitoring environment that ensures that audio productions can be reliably transmitted to any desired sound system - regardless of the production type or music genre.