Sennheiser HD 400 Pro
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Manufacturer Information
Sennheiser
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An Heir to Sennheiser's Precision
Part of the brand's line of reference open-back headphones, the HD 400 PRO emphasizes neutrality and clarity in the lower spectrum, two essential criteria for modern mixing work. Compared to previous generations, it features angled transducers and optimized tuning for an even more linear tonal balance, while maintaining the natural listening signature typical of Sennheiser open-back headphones.Who It's For and Intended Uses
The HD 400 PRO is aimed at sound engineers, producers, beatmakers, and content creators seeking a reliable monitoring headphone for both home and studio use. Its spacious soundstage facilitates fine editing, element placement in the panorama, and reverb control. Like all open-back headphones, it excels in mixing and mastering but is less suited for close-miking recording situations.Precision, Comfort, and Reliability for Everyday Use
Its acoustic tuning favors a linear response from 6 to 38,000 Hz, with extended and controlled bass to assess low-end balance without overload. The open architecture and angled transducers provide realistic spatialization that highlights the depth and width of your mixes while minimizing internal coloration.Ergonomically, its 240 g weight, adjustable headband, and velvet ear pads ensure discreet wear during long sessions. The single-sided cable reduces clutter, while the choice between straight and coiled cables adapts to your desk or control room setups. With an impedance of 120 Ohms and total harmonic distortion below 0.05%, the HD 400 PRO combines dynamics, clarity, and low listening fatigue, perfectly compatible with most current audio interfaces.
Technical specifications
| Format | circumaural |
| Design | open |
| Impedance | 120 Ω |
| Color | Black |
| Weight without cable | 240 g |
| SPL | 110 dB (1 kHz / 1 V RMS) |
| Frequency response | 6 - 38,000 Hz |
| THD | < 0.05% at 1 kHz / 90 dB SPL |
Questions frequently asked
Is the Sennheiser HD 400 Pro suitable for mixing and mastering?
Its open design, frequency response stated as 6 to 38,000 Hz, and harmonic distortion below 0.05% at 1 kHz / 90 dB SPL meet the needs of mixing and mastering. The wide soundstage facilitates panning placement and reverb control.
Can vocals be recorded with this open-back headphone?
The open architecture allows sound to pass through, making it less suitable for close microphone recordings. It is better intended for studio or home listening work.
What is the headphone impedance and with which sources should it be used?
With an impedance of 120 Ω, this model is stated as compatible with most current audio interfaces. Its SPL reaches 110 dB at 1 kHz for 1 V RMS.
Is the HD 400 Pro comfortable for long sessions?
A weight of 240 g without cable, an adjustable headband, and velvet ear pads favor discreet wear during long sessions.
Which cables are supplied with the headphone?
The single-sided cabling limits clutter around the workstation. The choice between a straight cable and a coiled cable allows adaptation of the setup to a desk or control room. The angled drivers contribute to a realistic spatial reproduction.
