Field Test · Studio Gear Review
Sennheiser HD 599
Technical assessment of Sennheiser’s HD 599 open-back design and sound quality
Sennheiser
- Over-Ear Headphones
- Unique look
- Options for different audio sources
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Spec Sheet
- Circumaural
- Open-back
- Cable attached on one side
- Max. SPL: 106 dB SPL @ 1 kHz, 1 V RMS
- Impedance: 50 Ohm
- Frequency range: 12 – 38500 Hz
- Total harmonic distortion at 1 kHz < 0.1%
- 3 m Cable with 6.3 mm jack
- 1.2 m cable with straight 3.5 mm jack plug
- 6.3 mm to 3.5 mm adapter
- Weight: 250 g
Studio Log
| Available since | February 2019 |
|---|---|
| Item number | 458313 |
| Sales Unit | 1 piece(s) |
| Design | Over-Ear |
| System | Open |
| Impedance | 50 Ohms |
| Frequency range | 12 Hz – 38500 Hz |
| Adapter | Yes |
| Replacable Cable | Yes |
| Marrone/Argento | Creme |
| Sensitivity | 106 dB |
| Type Of Connector | Jack |
| Weight | 250 g |
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QC Pass — Field Test
Customer Review Summary
Overview of the Sennheiser HD 599
The Sennheiser HD 599 is an open-back, over-ear headphone released in February 2019, positioned as a versatile audio device suitable for home listening and general media consumption. It offers a frequency response of 12 Hz to 38,500 Hz and an impedance of 50 Ohms, making it easy to drive from a variety of sources such as smartphones, tablets, and dedicated amplifiers. At a retail price of around £122, it targets budget-conscious consumers looking for quality sound without professional-grade equipment costs.
Design and Comfort
The HD 599 features a circumaural, open-back design with cream-coloured ear cups and silver detailing. Weighing 250 grams, these headphones are noted for their lightweight construction and ample padding, which provide excellent comfort even during extended listening sessions. Multiple users wearing glasses or with larger heads have reported a secure yet gentle fit that avoids discomfort or ear fatigue. The velour ear pads fully envelop the ears without pressing excessively, while the open-back system ensures that ears are not enclosed in a sealed environment, promoting prolonged use without heat buildup.
The device includes two detachable cables: a 3-metre cable with a 6.3 mm jack and a 1.2-metre cable with a straight 3.5 mm plug, along with a 6.3 mm to 3.5 mm adapter. This flexibility allows easy connection to various audio equipment. However, some users have noted a desire for sturdier cable locking mechanisms to avoid accidental disconnects, which the standard cables may not provide.
Sound Quality and Performance
The HD 599 embodies what could be described as the classic Sennheiser sound signature: a balanced and neutral presentation with a hint of warmth, suitable for many genres and sources. The headphones are praised for clear mids, pleasant vocals, and refined, non-aggressive treble reproduction. The wide soundstage is a notable feature, offering spaciousness that benefits orchestral, jazz, and instrumental music. However, the bass is relatively moderate and non-exaggerated, which could disappoint listeners who prefer a pronounced low-end presence. Some users have pointed out a slight muddiness in mids caused by bass bleed, which can impact detailed listening or precise mixing tasks.
In terms of distortion, the HD 599 performs excellently with a total harmonic distortion below 0.1%, assuring clean sound clarity at normal listening volumes. Sensitivity of 106 dB SPL at 1 kHz allows them to reach sufficient loudness without the need for powerful amplification. Still, pairing with a dedicated DAC or amplifier can enhance fidelity and dynamic range. The open design does, however, limit their use in noisy environments or where sound leakage might disturb others.
Use Cases and Practicality
These headphones are particularly well suited for casual listening at home and multimedia use. Users report satisfaction with the HD 599 for gaming, TV watching, and general music enjoyment spanning multiple genres. Their comfort and sound profile make them good candidates for long sessions without ear fatigue. However, the headphones are not intended for professional studio monitoring or critical mixing, where a more linear and detailed response is required. Audiophiles seeking extensive bass detail or pinpoint accuracy in midrange might find the HD 599 lacking compared to higher-tier models or closed-back alternatives.
The open-back design also means ambient noise is easily heard, which is ideal for quiet environments but restricts mobility and use in public spaces where isolation is preferred. Durability is generally satisfactory, though the plastic construction is less premium compared to some competitors, but it contributes to the overall light weight. The absence of a carrying case is noted but not considered a major issue for home users.
Pros and Cons Summary
- Pros: Excellent comfort for long use, balanced and clear sound signature, lightweight, open and spacious soundstage, easy to drive, replaceable cables included
- Cons: Moderate bass extension may disappoint bass lovers, some users report cable issues, not suitable for closed environments due to sound leakage, plastic construction less premium, not ideal for critical mixing or professional use
Final Verdict
The Sennheiser HD 599 is a strong contender in the affordable audiophile headphone segment. It offers a refined, comfortable listening experience with a sound profile that blends neutrality with musical warmth. While it is not the best choice for studio professionals or those demanding highly accurate bass reproduction, it excels as an everyday headphone for relaxed music enjoyment, gaming, and multimedia use at home. The value proposition is enhanced by thoughtful design features like detachable cables and lightweight materials, though more robust cable engineering would be welcome.
, the HD 599 is a reliable, well-constructed open-back headphone with a sound character that appeals to many casual listeners and hobbyists. It serves as an excellent introduction to high-fidelity sound without demanding specialised hardware or excessive investment. Prospective buyers should consider their listening environment and preferences carefully but can expect a quality product from Sennheiser’s respected lineup at a competitive price point.
