Field Test · Studio Gear Review
Superlux HD-681
Superlux Semi-Open Headphones Deliver Remarkable Audio Performance
Superlux
- Studio Headphones
- Great sound at an affordable price
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Spec Sheet
- Semi-open
- Circumaural (full size)
- Dynamic
- Self-adjusting headband
- Peak SPL: 98 dB
- Impedance: 32 Ohm
- Frequency Range: 10 – 30000 Hz
- Maximum Power: 300 mW
- THD 100 mW@1KHZ<1%
- 2.5m Cable with 3.5 mm Stereo mini-jack
- Weight (including cable): 278 g
- Weight (excluding cable): 230 g
- Including 6.3 mm mini-jack adapter and a bag
Studio Log
| Available since | April 2009 |
|---|---|
| Item number | 218865 |
| Sales Unit | 1 piece(s) |
| Design | Over-Ear |
| System | Semi Open |
| Impedance | 32 Ohms |
| Frequency range | 10 Hz – 30000 Hz |
| Adaptor | Yes |
| Replaceable Cable | No |
| Colour | Black |
| Sensitivity | 98 dB |
| Max. SPL | 98 dB |
| Type Of Connector | Mini Jack |
| Type Of connector | Jack |
| Adapter | Yes |
| Weight | 230 g |
| Marrone/Argento | Black |
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Customer Review Summary
[META]Superlux HD-681 headphones offer impressive sound clarity and bass response in a lightweight, semi-open design, ideal for budget-conscious audiophiles and studios.Overview
The Superlux HD-681 is a semi-open, circumaural headphone that has been available since 2009. Despite its modest retail price of £19.90, this model offers features and sound quality that can rival considerably more expensive headphones. Targeted at users seeking a budget-friendly option for casual listening, studio work, and monitoring, it stands out due to its wide frequency response and balanced tonal profile.
Design and Comfort
The HD-681 sports an over-ear, semi-open design with a self-adjusting headband for ease of fit. Although primarily constructed from plastic, the build quality is acceptable for the price, with metal elements reinforcing the headband to provide flexibility and durability. Weighing approximately 230 grams (278 grams including its fixed cable), it remains lightweight enough for extended wear sessions.
Users report that the ear cups offer a spacious fit, accommodating larger ears comfortably. However, the default faux-leather pads tend to become warm during prolonged use, which can cause discomfort, especially in hotter conditions. Upgrading to velour pads significantly improves comfort and reduces heat buildup, although this modification slightly alters sound signature.
Audio Performance
The headphones feature dynamic drivers with an impedance of 32 ohms and sensitivity at 98 dB, allowing them to be easily driven by most portable devices and amps. The frequency response spans a notably wide range from 10 Hz to 30,000 Hz, capturing deep bass and clear treble frequencies.
- Bass: Deep and defined without being overbearing. Bass notes are precise and fast, surpassing many headphones in the under-£100 category.
- Mids: The midrange is relatively clean, though somewhat dry or lean. This results in faithful reproduction of instruments but with less emphasis on detail retrieval.
- Treble: The high frequencies tend to be slightly boosted, sometimes described as sharp or piercing over longevity. This characteristic contributes to perceived detail but may induce listening fatigue at higher volumes.
Despite its semi-open nature allowing some ambient noise ingress, the HD-681 offers a spacious and immersive soundstage, suitable for gaming, casual listening, and studio monitoring environments where external awareness is beneficial. Distortion levels remain low (THD <1% at 100 mW), maintaining sound clarity across playback volumes.
Cable and Connectivity
This model comes equipped with a fixed 2.5-metre cable terminating in a 3.5 mm stereo mini-jack, alongside a 6.3 mm adapter for compatibility with professional audio equipment. The cable is thick and robust, reducing microphonics though its non-detachable nature limits replacement options. Users note occasional cable-induced vibrations on the metal headband supports, which can be damped effectively with simple DIY tweaks such as tape application.
Durability and Practical Use
While the construction utilises lightweight materials and plastics, many users acknowledge the build as adequate for typical home and studio use. However, repeated mechanical stress, especially on the headband, can lead to cracking or wear over time. Replacement parts or repairs are feasible, making it viable for those willing to maintain their equipment carefully.
The semi-open design means sound leakage is noticeable, making the HD-681 less suitable for noisy environments or professional mixing where isolation is critical. Nevertheless, this design offers natural monitoring benefits, fitting well within home studios and casual settings.
Conclusion
The Superlux HD-681 headphones deliver remarkable sound performance for their remarkably low price. Their extended frequency range, clear bass, and spacious soundstage offer value rarely found in such budget offerings. Although comfort and build quality reflect some cost-saving measures, and treble can be slightly fatiguing without equalisation, these are acceptable trade-offs for the price bracket.
For casual listeners, gamers, and budding musicians requiring an affordable and versatile listening solution, the HD-681 is a compelling choice. Complementary upgrades such as velour pads and software equalisation can further enhance their usability and sonic balance.
