Nova Zhang
The Sennheiser HD 650 is a popular choice for those seeking reference-quality, open-backed headphones. They are known for their comfort and well-designed build. However, some users have reported experiencing sound distortion, especially at low volumes, and with certain types of music. The open-back design of the HD 650 also means that there is limited sound isolation from ambient noise, and sound leakage can occur. In this paragraph, we will explore whether the HD 650 distorts ambient sound and provide insights into potential causes and solutions for sound distortion.
| Characteristics | Values |
|---|---|
| Ambient sound distortion | Does not exhibit notable passive amplification (1dB) of ambient noise |
| Sound quality | Excellent for reference quality, mixing, mastering, and extended listening sessions |
| Comfort | Soft padding surrounds ear cups and lines headband |
| Accessories | Y cable and short adapter cable included |
| Design | Open-backed, no storage case or folding hinges |
| Use case | Intended for home or studio use only |
| Build | Plastic parts with a subtle grey metallic sparkle |
| Performance | Requires proper amplification to open up sound and achieve full dynamics |
| Volume | Sounds best at higher volumes, with some distortion at lower volumes |
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What You'll Learn
The HD650 is not suitable for outdoor use
The Sennheiser HD650 is an excellent choice for anyone looking for a comfortable, classic, great-sounding pair of headphones for extended sessions at their listening station. However, the HD650 is not suitable for outdoor use.
Firstly, the HD650 does not come with a storage case, and there are no folding hinges to compact the headphones. This lack of portability underscores that they are intended for home or studio use only.
Secondly, the HD650 is an open-backed headphone design, which means there is virtually no sound isolation from the outside world. While this contributes to a natural timbre few modern headphones can match, it also means that sound will leak out of the headphones, making them unsuitable for outdoor use or use in noisy environments.
Additionally, the HD650 requires proper amplification to sound its best. When underpowered, the HD650 can sound compressed, bass-shy, and flat. While modern dongles and integrated audio interfaces can drive them loud enough, they rarely supply the required voltage for full dynamics.
Furthermore, the HD650 sounds best at moderate to high volumes. At quieter volumes, the treble is barely audible, and the sound lacks atmosphere and dynamics. This further limits the suitability of the HD650 for outdoor use, as listening at high volumes outdoors may not always be possible or advisable.
In conclusion, while the Sennheiser HD650 is a fantastic choice for indoor, stationary listening, it is not designed or optimised for outdoor use due to its lack of portability, open-back design, amplification requirements, and volume considerations.
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They are open-backed headphones with no sound isolation
The Sennheiser HD 650 is an open-backed headphone model that has been on the market for close to two decades. Its open-back design means that there is virtually no sound isolation from the outside world, and sound will leak out of the headphones. This is a common feature of open-back headphones, and it means that they are intended for home or studio use only.
The lack of sound isolation in the HD 650 means that they are best suited for quiet places such as a private office or den. They do not exhibit any notable passive amplification of ambient noise, which is sometimes seen in open-back headphones. This means that the HD 650 does not distort ambient sound to a significant degree.
However, it is important to note that the HD 650 does have some drawbacks due to its open-back design. In addition to the lack of sound isolation, the headphones may not have enough volume when plugged directly into a phone or laptop. They may also lack bass response and require proper amplification to sound their best.
Despite these limitations, the HD 650 remains a popular choice for audio enthusiasts due to its comfort, sound quality, and accuracy. Many users report that the HD 650 sounds significantly better at higher volumes, where its true potential can be fully appreciated.
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They require proper amplification to sound their best
The Sennheiser HD 650 is a classic, comfortable, open-backed headphone that has been a stalwart of the brand for close to two decades. It is a popular choice for those looking for reference-quality headphones with an excellent sound signature and listener comfort.
However, the HD 650s have their drawbacks. Firstly, they are not designed for use outside quiet places like a private office or den. They do not offer any sound isolation from the outside world, and sound will leak out of the headphones.
Secondly, and most importantly, the HD 650s require proper amplification to sound their best. While modern dongles and integrated audio interfaces can drive them loud enough, they often do not supply the required voltage for full dynamics. Underpowered HD 650s will sound compressed, bass-shy, and flat.
Proper amplification opens up the headphones, restoring their transient punch and giving them an effortless flow. They respond beautifully to gentle EQ, and engineers have found that specific adjustments can enhance the listening experience. A low-shelf cut around 100 Hz (-1 to -2 dB) cleans up warmth, a presence lift around 3–5 kHz (+2 dB) restores vocal clarity and snare definition, and a subtle high-shelf boost above 8 kHz (+1–2 dB) adds air.
Calibration software with model-specific correction curves can also be used to achieve a more precise, repeatable neutral target, flattening small resonances that cannot be fixed manually. With calibration, the HD 650 becomes one of the most accurate mixing headphones available.
In summary, while the Sennheiser HD 650 is a well-loved and comfortable pair of headphones, they require proper amplification and calibration to sound their best. Without sufficient power and adjustments, the headphones may not perform optimally, resulting in a compressed and flat listening experience.
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They are sensitive to the quality of the audio source
The Sennheiser HD650 headphones are highly sensitive to the quality of the audio source. Being an open-back design, they are very transparent, and will honestly reflect the quality of the audio signal and the capabilities of the equipment in the chain.
The HD650s are revealing of source and amplification gear and will show up any weaknesses in the audio chain. This includes the quality of the recording and the capabilities of the amplifier. If the source has a poor-quality DAC or amplifier, or if the recording is of low resolution or quality, this will be evident in the sound produced by the HD650s.
These headphones are highly detailed and accurate, with a very revealing and transparent soundstage. This means that they will faithfully reproduce the audio signal, warts and all. If the source is poor quality, this will be reflected in the sound, which may seem distorted or muddy.
The HD650s have a very flat response curve, with a slight emphasis on the bass and treble. This means that they are very neutral and accurate, but it also means that they need a good quality source to really shine. A poor source will result in a loss of detail and a less immersive experience.
To really get the most out of the HD650s, a high-quality audio source is required. This includes a good DAC and amplifier, as well as high-resolution audio files. Only then will the true potential of these headphones be realised, with a detailed, immersive, and accurate soundstage.
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They are comfortable and well-designed for extended use
The Sennheiser HD 650 is an excellent choice for anyone seeking a classic, great-sounding, comfortable, and open-backed headphone for extended use. The ear cups and headband are generously padded, ensuring comfort during long listening sessions. The headphones are built on a frame that Sennheiser has optimised over the years, and the plastic parts feature a subtle grey metallic sparkle finish.
The HD 650 is widely regarded as a reference headphone, not just for its sound signature but also for its comfort. The smoothness of the sound reproduction makes it forgiving for extended listening periods. The midrange neutrality is exceptional, with vocals, strings, and acoustic instruments retaining a natural timbre that few modern headphones can match.
While the HD 650 may not provide sound isolation from the outside world due to its open-back design, it is still suitable for quiet environments such as private offices or dens. It exhibits minimal passive amplification of ambient noise, which is a common issue with other open-back headphones. This makes it ideal for extended use without being disturbed by external sounds.
The HD 650 has been on the market for close to two decades, and its popularity has endured due to its comfort and performance. It is a reliable choice for anyone seeking reference-quality headphones that offer both listener comfort and accurate sound reproduction. The headphones are also built to last, with consistent manufacturing quality. However, some parts may need replacement with frequent use over the years, such as the ear pads and headband.
Overall, the Sennheiser HD 650 is a well-designed and comfortable option for extended use, providing a smooth and natural listening experience in a quiet environment. Its enduring popularity and optimised design make it a reliable choice for anyone seeking reference-quality headphones.
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Frequently asked questions
Sennheiser HD650 headphones do not exhibit notable passive amplification of ambient noise. However, they do not provide sound isolation, and sound will leak out of the headphones.
The distortion may be due to the original recording of the music you are listening to. The HD650 headphones will let you hear all the bad and good aspects of a given recording.
If the distortion is due to the headphones themselves, you may need to replace the ear pads or headband, as these parts may degrade with frequent use. You can also try using an amp to eliminate distortion at higher volumes.
If you are experiencing hearing damage, your volume is too high. You should not listen at a volume where you are worried about potential hearing damage.
