Field Test · Studio Gear Review
Superlux HD 381
Superlux HD 381 detailed technical review and user experience analysis
Superlux
- In-ear hi-fi earphones
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Spec Sheet
- Dynamic driver with 13.5 mm
- Impedance 16 Ohm
- Sensitivity 103 dB
- Frequency band 20 – 20,000 Hz
- Cable length 60 cm with stereo jack 3.5 mm
- Additional ear pieces
- Incl. Extension cable (60 cm) and cable clip
- Colour: Black
Studio Log
| Available since | December 2010 |
|---|---|
| Item number | 256180 |
| Sales Unit | 1 piece(s) |
| Number of Ways | 1 |
| Removable Cable | No |
| Colour | Black |
| Bass Boost | No |
| Midrange Boost | No |
| HiFi | Yes |
| Allround | No |
| Application | HiFi |
| Design | In-Ear |
| Number of Drivers | 1 |
| System | CLosed Back |
| Impedance | 16 Ohms |
| Frequency range min. | 20 Hz |
| Cable Length | 120 |
| Frequency range max. | 20000 Hz |
| Sensitivity | 103 dB |
| Type Of Connector | Mini Jack |
| Earmold possible | No |
| Weight | 12 g |
| Marrone/Argento | Black |
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Customer Review Summary
Overview and Technical Features
The Superlux HD 381 is a single-driver closed-back in-ear headphone launched in December 2010. Priced at £17.60, it targets listeners seeking budget HiFi audio in a portable form factor. The headphones feature a 13.5 mm dynamic driver with 16 Ohm impedance and a frequency response range spanning 20 Hz to 20 kHz. Sensitivity is rated at 103 dB, making them easy to drive from most portable music players or smartphones. They come with a fixed 60 cm cable terminating in a 3.5 mm stereo mini-jack, supplemented by a 60 cm extension cable and a clip for cable management.
In terms of construction, the HD 381 exhibits a basic plastic housing finished in black. The overall weight is light at 12 grams, improving comfort for prolonged wear. The package includes multiple ear tips for custom fit, though there is no earmold option. Notably, the cable is non-removable, which contributes to fragility concerns noted by some users.
Build Quality and Comfort
The HD 381’s build is utilitarian, prioritising function over aesthetics. While many reviewers appreciated the lightweight design and comfort during extended use, some described the plastic casing and thin cable as feeling fragile. Reports mention the cable being particularly slender and vulnerable to damage over time. The inclusion of a 60 cm extension cable alleviates the short length of the main cable, which was highlighted as inconvenient for certain uses. A cable clip helps reduce tugging and accidental disconnections.
Ergonomically, the headphones sit securely in the ear canal and maintain a good seal, which assists in passive noise isolation, although isolation is moderate rather than complete. Several users praised the consistent fit, citing it stays in place during activities such as jogging or rehearsing. The package provides several sized ear tips allowing users to tailor comfort, which is essential given the in-ear design. However, some consumers with smaller or uniquely shaped ears found fit challenging.
Sound Quality and Performance
Sound reproduction by the Superlux HD 381 presents a warm and full profile with emphasised bass and treble, while midrange frequencies are somewhat recessed or ‘badewannig’ (tub-like) as characterised by some users. Bass response tends to extend deeply without overwhelming the mids, resulting in a pleasant punch for genres like metal, rock, blues, and electronic music. Details in the treble range are clear though occasionally sharp peaks can cause listener fatigue at higher volumes.
Compared to more expensive earphones such as the Sennheiser IE6 or certain Beyerdynamic models, the HD 381 holds its ground surprisingly well, especially considering the price point. However, professional users seeking flat frequency responses or high-resolution monitoring found limitations with these earphones. They are more suited for casual listening than precise audio analysis. The headphones also perform aptly for live band rehearsals and as backup in-ear monitors, benefiting from decent ambient noise attenuation.
Several reviews noted that using an equaliser to adjust bass and treble balance improves overall tonal accuracy and listening experience markedly. Without tuning, some music productions can sound harsh or unnatural through this model.
Limitations and Shortcomings
- Fragile cable and connectors: The thin cable and solder joints may fail prematurely under regular wear or strain, and a weak adhesive inside the earbud casing can cause parts to separate.
- Short cable length: The 60 cm main cable is inadequate for many everyday scenarios, necessitating use of the supplied extension, which can be cumbersome.
- Moderate noise isolation: Passive isolation reduces external noise but is insufficient for very noisy environments or critical monitoring.
- Fit variability: Not all ear shapes accommodate the earbuds easily, requiring experimentation with eartips.
- Sound signature not neutral: The bass boost and treble lift may not satisfy users wanting accurate or analytical audio.
Conclusion
The Superlux HD 381 in-ear headphones offer notably good sound quality and comfort within their modest price bracket of £17.60. They deliver strong bass presence and clear highs with a warm overall character that appeals for casual music listening and light monitoring tasks. Their light weight and secure fit support extended wear, making them suitable for exercise or travel. However, their build quality and cable robustness fall short of premium standards, and their relatively short cable length is inconvenient without the extension. The sound signature shows limitations for professional monitoring or critical listening yet delivers excellent value for HiFi enthusiasts on a budget.
, the HD 381 deliver superb bang-for-buck performance that will impress entry-level users and hobbyists who prioritise comfort and engaging sound above strict accuracy. Treating the cables with care will extend lifespan, but buyers should temper expectations about durability. For under £20, the Superlux HD 381 remain a compelling, pragmatic choice in the crowded entry-level in-ear headphone market.
