Field Test · Studio Gear Review
Sennheiser HD 600
In-depth technical evaluation of Sennheiser’s renowned HD 600 over-ear headphones
Sennheiser
- Headphones
- Wide frequency range and neutral sound
- For home, HiFi, and professional use
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Spec Sheet
- Dynamic
- Open
- Circumaural
- Impedance: 300 Ohm
- Sound pressure level: 97 dB
- Frequency range: 12 – 39,000 Hz
- Two-sided cable routing
- 3 m Cable with 3.5 mm jack connection
- Weight without cable: 253 g
- Weight with cable: 309 g
- Includes 6.3 mm jack screw adapter
Studio Log
| Available since | September 2019 |
|---|---|
| Item number | 471751 |
| Sales Unit | 1 piece(s) |
| Design | Over-Ear |
| System | Open |
| Impedance | 300 Ohms |
| Frequency range | 12 Hz – 39000 Hz |
| Adapter | Yes |
| Replacable Cable | Yes |
| Marrone/Argento | Black |
| Max. SPL | 97 dB |
| Sensitivity | 97 dB |
| Type Of Connector | Mini Jack |
| Adaptor | Yes |
| Weight | 309 g |
| Replaceable Cable | Yes |
| Colour | Black/Gray |
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QC Pass — Field Test
Customer Review Summary
Introduction
The Sennheiser HD 600 is a longstanding staple in professional audio, celebrated for its transparent and natural sound signature. Originally released in September 2019, this open-back, over-ear headphone with a 300 Ohm impedance is often considered a reference tool for critical listening, mixing, and mastering. At £277, the HD 600 promises audiophile-grade clarity within a modest price bracket.
Design and Build Quality
The HD 600 sports a minimalist black and grey aesthetic, prioritising function over flash. Its build is predominantly plastic, resulting in a lightweight device weighing 253g without the cable and 309g with the supplied 3-metre dual-sided cable attached. While the plastic construction may not feel luxurious, users report the headphones are robust and reliably long-lasting.
The replaceable cable terminates in a 3.5 mm mini-jack with an included 6.3 mm screw-in adapter, ensuring compatibility with various audio equipment. However, users often highlight the excessive length of the cable as a minor inconvenience for desk use due to tangling and potential wear.
Comfort and Fit
With large circumaural pads, the headphones cover the ears fully, providing comfort over extended periods. Initial impressions often describe a firm clamping pressure on the head, which tends to ease after repeated use. The padding is soft but somewhat firm, and while the fit secures well for active sessions, some find the headband pressure uncomfortable after several hours. Nevertheless, the HD 600 is generally well suited for long mixing and mastering sessions without fatigue.
Technical Specifications and Sound Characteristics
Operating with an impedance of 300 Ohms, the HD 600 suits use with dedicated headphone amplifiers or professional audio interfaces rather than direct connection to portable devices. The frequency response from 12 Hz to 39,000 Hz covers a broad range, though the headphones’ output peaks at a maximum sound pressure level of 97 dB, requiring ample gain to achieve optimal volume.
Sound Quality
- Frequency Response and Tonal Balance: The HD 600 offers a notably flat and neutral frequency response. Mids are exceptionally clear and natural, enabling vocal performances and instruments to emerge realistically from mixes.
- Bass: The bass range is well-defined and tight rather than overly boosted, with good presence in the mid-bass. Sub-bass extension is somewhat limited, which may disappoint listeners who favour electronic or bass-heavy genres like EDM or hip-hop without supplementary EQ.
- Treble: Treble reproduction is smooth and detailed, avoiding harshness or fatigue over long listening periods. The upper frequencies are distinct yet soft enough to maintain comfort.
- Imaging and Soundstage: While the opening of the back allows for an airy sound, the perceived soundstage is precise but not particularly expansive, situating instruments with clarity though lacking the breadth found in some competitor models.
- Distortion and Dynamics: The headphones maintain low distortion at reasonable listening volumes. Dynamics feel natural, supporting critical work without colouring the audio.
Use in Production Environments
The HD 600 excels as a tool for mixing and mastering, credited widely for its truthful representation of audio material. Its balanced sound makes it easier to identify mistakes or frequency imbalances while mixing, especially when paired with a quality headphone amplifier such as the RME Fireface 800.
Adaptors and replaceable cables add to the HD 600’s practicality in professional setups. However, its high impedance necessitates adequate amplification, direct connection to low-powered sources like smartphones or certain USB DACs can result in insufficient volume or compressed sound.
Comparison to Contemporary Alternatives
Compared to models like the Audio Technica ATH-R70X and Austrian Audio Hi-X65, the HD 600 maintains a more balanced sound without artificial enhancements. While some competitors may provide a wider soundstage or enhanced bass, the HD 600’s neutrality is superior for reference listening and workflow reliability.
Limitations
As an open-back headphone, the HD 600 allows ambient sound to pass through freely, which can be problematic in noisy or shared environments. Its lack of sub-bass depth may underwhelm those who prefer bass-heavy playback unaltered by EQ. Furthermore, the initial clamping force can cause discomfort to users at first, and the supplied cable’s length and durability may not suit all uses.
Conclusion
The Sennheiser HD 600 remains a highly regarded choice for professionals and enthusiasts seeking honest, detailed audio reproduction at a competitive price. Its transparent and smooth sonic signature, combined with reliable build and comfort for long sessions, make it an excellent reference headphone for mixing and mastering tasks.
Users should be prepared to invest in a suitable headphone amplifier and consider minor EQ adjustments for genres demanding enhanced bass response. Those seeking headphones for casual listening in noisy environments will find its open design less practical.
Overall, the HD 600 offers exceptional value for money as a classic, neutral-sounding open-back headphone with long-term usability and proven audio fidelity.
