Sennheiser HD 400 PRO Studio Reference Headphones

RM 1559.00

SKU: 700047

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Audio engineers and music producers looking for professional-grade studio reference monitoring headphones will be thrilled with the Sennheiser HD 400 PRO, a pair of open-back circumaural headphones designed for mixing and other pro audio applications. With a frequency response of 6 Hz to 38 kHz, these headphones provide clear reproduction of audio.

The dynamic drivers utilize a specialized polymer blend in its diaphragm as well as a high-powered magnet to drive the system. The damping system manages ventilation, which allows for deeper bass while mitigating the distortion that otherwise impacts clarity. The open earcups and angled transducers allow for a wide and transparent soundstage, recreating the optimal listening position found in high-end recording studios.

The lightweight HD 400 PRO sports velour earpads, which provide the ultimate comfort for long listening sessions. A single-ended, coiled cable with a 3.5mm plug provides you the freedom to operate. A straight cable and a 3.5mm to 1/4" adapter are also included.

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

Sennheiser HD 400 PRO Specs


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


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 1/8" / 3.5 mm TRS Male Straight
Connector Plating Gold
Adapter (Included) 1/4" TRS
Cable Design Single-Sided
Audio Connector to Earpiece 1 x 1/8" / 3.5 mm Male
Cable Length 9.8' / 3 m (Coiled Cable)
5.9' / 1.8 m (Straight Cable)
Cable Color Black


Operating Temperature 5 to 131°F / -15 to 55°C
Storage Temperature -67 to 158°F / -55 to 70°C
Operating Humidity 90%


Color Black
Water Resistance None
Weight 8.5 oz / 240 g (without Cable)
  • Circumaural, Open-Back Design
  • Neutral Sound Reproduction
  • Padded Headset for Prolonged Listening
  • 6 Hz to 38 kHz Frequency Response
  • Distortion-Free Sound Reproduction
  • SPL up to 110 dB
  • 9.8' Coiled Cable with 3.5mm Plug
  • 5.9' Straight Cable with 3.5mm Plug
  • Includes 3.5mm to 1/4" Adapter
  • Sennheiser HD 400 PRO Studio Reference Headphones
  • Coiled Cable
  • Straight Cable
  • 1/4" Adapter

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