Sennheiser HD 400 PRO Headphones

Reference-grade headphones for project and professional mixing sessions

The frequency range of HD 400 PRO was developed to be honest across the board, especially when it comes to the lower end of the spectrum. The angled transducer design allows for unique stereo imaging, reproducing the spatial sound of your mix. In other words, what goes in is what comes out. Reproducing analytical audio, the HD 400 PRO reference headphones are your everyday tool to get the job done.

Open back, open mix

Open ear cups allow for a wide and transparent soundstage, recreating the optimal listening position found in high-end recording studios. Artifacts of a confined space are a thing of the past. These studio headphones do not construe, but rather ensure neutral transparency – the groundwork for the best mixes.

The perfect synergy of comfort & precision

Let's face it, mixing sessions are never quick. The HD 400 PRO's lightweight design allows you to focus on your project for hours on end. Articulating earcups, velour earpads and an adjustable headband allow for adaptability and comfort to perfectly match the shape of your head. Our self-developed 120-ohm transducers are tuned for accuracy to deliver every detail of your mix. The highly efficient driver magnet provides clarity while its damping system manages ventilation. This results in deeper bass while extenuating distortion that otherwise impacts sound quality — a difference professional users will appreciate.

More tools for more options

The HD 400 PRO features a detachable coiled cable. For convenience, a straight cable is also included in the delivery. With a screw-on adapter you can connect to your mixing desk, audio interface or any audio device that has a 1/4-inch (6.3mm) or 1/8-inch (3.5mm) output.

Place yourself in the sweet spot of your mixing environment

With dearVR MIX, the immersive audio expert Dear Reality turns the HD 400 PRO into a virtual world-class stereo mix room with carefully designed acoustics, all through advanced spatial audio technology. Gain confidence and create better mixes by inserting the AAX/VST3/AU plugin into your DAW and monitoring your session in reference studio acoustics or additional common listening environments, such as a car. With Dear Reality’s unique Spatial Headphone Compensation (SHC) technology, the sound characteristics of the HD 400 PRO remain unrestricted in the virtual studio environment, providing a monitoring solution to ensure that audio productions translate reliably to any sound system – regardless of production type or music genre.

Key features

A professional's tool with neutral sound reproduction
Lightweight design for all-day usage
Single-sided, coiled cable allows freedom to operate. For convenience, a straight cable is also included
Angled transducers designed for low distortion at high SPL's provide a spacious and accurate soundstage

Spec

Headphone

Earpiece Design : Over-Ear (Circumaural), Open-Back
Earpiece Connection / Wearing Style : Headband
Foldable : No
Driver Type : Dynamic
Impedance : 120 Ohms
Active Noise Cancellation : No

Performance

Frequency Response :  6 Hz to 38 kHz
Resonant Frequency : None
Maximum Sound Pressure Level (SPL) : 110 dB at 1 kHz / 1 Vrms
Total Harmonic Distortion (THD) : 0.05%

Wired Connectivity

Audio Connector to Source : 1 x 3.5 mm TRS Male Straight
Connector Plating : Gold
Adapter (Included) : 1/4" TRS
Cable Design : Single-Sided
Audio Connector to Earpiece : 1 x 3.5 mm Male
Cable Length : 3 m (Coiled Cable), 1.8 m (Straight Cable) Cable
Color : Black

Environmental

Operating Temperature : -15 to 55°C
Storage Temperature :  -55 to 70°C
Operating Humidity : 90%

Physical

Color : Black
Water Resistance : None
Weight : 240 g (without Cable)