Sennheiser

Sennheiser 700047 HD 400 PRO Studio Mixing Headphones

4.7 (11 reviews)

Hear Every Nuance with Studio-Quality HeadphonesThe Sennheiser HD 400 PRO open-back headphones are engineered for professional studio use, providing a neutral and accurate sound reproduction for mixing, video, and audio production. Key Features: Sound Reproduction: Neutral and accurate for...

$265.00*
In Stock on Amazon.com
View on Amazon

*Price sourced from Amazon.com. Last updated:Jul 13, 2026.Price and availability are subject to change.

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

Hear Every Nuance with Studio-Quality Headphones

The Sennheiser HD 400 PRO open-back headphones are engineered for professional studio use, providing a neutral and accurate sound reproduction for mixing, video, and audio production.

Key Features:

  • Sound Reproduction: Neutral and accurate for professional use
  • Design: Lightweight for extended use
  • Cable: Single-sided, coiled cable (straight cable included)
  • Transducers: Angled for low distortion at high SPL, providing a spacious soundstage

Detailed Specifications:

  • Headphones Jack: 3.5 mm Jack
  • Connectivity Technology: Wired
  • Frequency Range: 6 Hz to 38 kHz
  • Item Weight: 240 Grams (8.5 ounces)
  • Cable Feature: Retractable
  • Audio Driver Type: Dynamic Driver
  • Earpiece Shape: Over-ear (circumaural)
  • Color: Black
  • Impedance: 120 Ohms

Key Features

1.8m Straight Cable 3m Coiled Cable with 3.5mm Connector

Open-back Studio Headphones with Velour Earpads

3.5mm to 6.3mm Adapter

Specifications

Model
HD 400 PRO
Type
Open-back Studio Mixing Headphones
Earpad Material
Velour
Included Cables
1.8m Straight Cable, 3m Coiled Cable
Connector Type
3.5mm
Included Adapter
3.5mm to 6.3mm Adapter

Pros & Cons

👍 Pros

  • These Sennheiser HD 400 PRO headphones feature an open-back design, which typically provides a wider, more natural soundstage for mixing.
  • Equipped with velour earpads, they are designed to offer enhanced comfort during long studio mixing sessions.
  • The package includes both a 1.8m straight cable and a 3m coiled cable, providing flexibility for different studio setups.
  • A 3.5mm connector is standard, and a 3.5mm to 6.3mm adapter is included, ensuring broad compatibility with various audio interfaces.
  • Optimized for studio mixing, these headphones are likely tuned for accurate and neutral sound reproduction.

👎 Cons

  • The open-back design, while good for soundstage, offers little to no passive noise isolation, making them less suitable for tracking or noisy environments.
  • The velour earpads, while comfortable, may attract dust or pet hair and could require more frequent cleaning than leatherette pads.
  • Specific details on impedance, frequency response, or sensitivity are not provided, making it difficult to compare their technical audio performance.
  • The cables are detachable but not specified as being locking, which could lead to accidental disconnections in active studio use.
  • As studio mixing headphones, they are not ideal for casual listening in public spaces due to sound leakage and lack of isolation.

Frequently Asked Questions

Due to their open-back design, the Sennheiser HD 400 PRO headphones offer little to no passive noise isolation and will leak sound, making them less suitable for recording near live microphones.
The Sennheiser HD 400 PRO headphones come with comfortable velour earpads, designed for extended listening sessions.
The headphones include both a 1.8m straight cable and a 3m coiled cable, offering versatility for different studio setups.
The headphones feature a 3.5mm connector and come with a 3.5mm to 6.3mm adapter, ensuring broad compatibility with various audio equipment.
Yes, these are designated as "Studio Mixing Headphones," implying they are engineered for accurate and neutral sound reproduction essential for mixing.
No, as open-back headphones, the Sennheiser HD 400 PRO do not feature active or significant passive noise cancellation; their design is for an open soundstage.
The open-back design of the HD 400 PRO headphones typically provides a more expansive and natural soundstage, which is beneficial for critical listening during mixing sessions.