Field Test · Studio Gear Review
Superlux HD-681 Evo BK
Technical appraisal of the Superlux HD-681 Evo BK by Superlux, budget semi-open monitors
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Spec Sheet
- Dynamic
- Circumaural (full size)
- Semi-open
- 50 mm Driver
- Peak SPL: 98 dB
- Impedance: 32 Ohm
- Frequency Range: 10 – 30000 Hz
- Maximum Power: 300 mW
- 3,5 mm Stereo mini-jack
- Weight (excluding cable): 276 g
- Colour: Black
- Includes 1x 1m cable, 1x 3m cable, 6,3 mm Stereo mini-jack adapter, carry pouch and one extra pair of velour earpads
Studio Log
| Available since | April 2013 |
|---|---|
| Item number | 297902 |
| Sales Unit | 1 piece(s) |
| Design | Over-Ear |
| System | Semi Open |
| Impedance | 32 Ohms |
| Frequency range | 10 Hz – 30000 Hz |
| Adaptor | Yes |
| Replaceable Cable | Yes |
| Colour | Black |
| Sensitivity | 98 dB |
| Max. SPL | 98 dB |
| Type Of Connector | Mini Jack |
| Adapter | Yes |
| Weight | 276 g |
| Replacable Cable | Yes |
| Marrone/Argento | Black |
Demo Footage
Field Photography
QC Pass — Field Test
Customer Review Summary
Introduction to Superlux HD-681 Evo BK
The Superlux HD-681 Evo BK is a budget-friendly semi-open over-ear headphone first released in April 2013. Priced at £24.60, it aims to deliver studio-grade sound performance with features typically found in more expensive models. This review assesses its technical specifications, sound quality, comfort, and durability based on extensive user feedback and hands-on experience.
Technical Specifications and Design
- Driver Size: 50 mm dynamic drivers
- Impedance: 32 ohms
- Frequency Response: 10 Hz to 30,000 Hz
- Sensitivity: 98 dB with a max SPL of 98 dB
- Design: Semi-open, circumaural (full size) headphones
- Weight: 276 grams (excluding cable)
- Connectivity: Mini jack (3.5 mm), including 6.3 mm adapter
- Cables: Two detachable cables included (1m and 3m)
- Accessories: Extra pair of velour ear pads and a carry pouch
- Colour: Black
The semi-open construction balances isolation with a natural soundstage, while the detachable cables offer flexibility for various studio or home setups.
Sound Quality Assessment
The HD-681 Evo offers a clear, well-balanced audio profile with a notable presence in mid and high frequencies, which is ideal for monitoring vocals and instruments during mixing. Instruments are well separated, providing transparency that punches well above the headphone’s price bracket. The bass is present and robust but tends to be somewhat less controlled, with occasional interference in the lower mids. Splendid clarity reveals nuances in long-familiar music tracks, offering fresh listening insights.
Users prone to sensitivity in the treble region noted the highs can feel sharp or sibilant straight out of the box. Fortunately, this can be mitigated either by applying an equaliser to reduce high-frequency peaks or by placing soft cotton pads inside the headphone cups to dampen excessive brightness. Both methods result in a smoother, more pleasant listening experience without compromising instrument clarity.
Spatial Imaging and Versatility
The semi-open design contributes to a spacious soundstage, delivering a sense of openness not always achievable in closed-back headphones. This feature makes the HD-681 Evo suitable for gaming and film watching as well as casual and professional music listening.
Comfort and Build Quality
Weighing 276 grams, these headphones feel lightweight and generally comfortable. The headband has been improved in the ‘Evo’ model version to reduce pressure on the head, eliminating the discomfort associated with the original HD-681’s stiff clamping force. However, extended sessions beyond two or three hours can bring mild fatigue or warmth, especially due to the semi-open construction and the nature of the original pleather ear pads, which prompt users to install the provided velour replacements for better breathability and comfort.
The ear cups fully encapsulate ears, but depending on individual ear shape, some may experience slight pressure around the ear cartilage after prolonged use. The adjustable headband flexes adequately to fit a range of head sizes, including larger heads, though the somewhat large ear cushions may feel bulky to some.
The build consists primarily of hard plastic, which does not feel fragile but lacks premium robustness. Many users report solid longevity under careful handling, although the mini-jack connection on the headphone side is a potential weak point. This connection utilises a male plug integrated into the left ear cup that has been prone to tearing or causing cable breakage after months of use, despite restricted handling.
Accessories and Practical Considerations
- Two detachable cables (1 metre and 3 metre) provide handy options depending on setup requirements
- 3.5 mm to 6.3 mm adapter included for compatibility with professional audio equipment
- Replacement velour ear pads supplied to improve comfort and hygiene
- Carrying pouch included for easier transport and protection
The detachable cables also serve as a safety feature; in cases where the cable is pulled accidentally during activity, it detaches instead of yanking the entire headphone off the head, preventing damage. However, users are advised to treat the cable connection with care to avoid premature failure.
Use Cases and Audience
The Superlux HD-681 Evo BK is well suited to beginner home studio environments, amateur musicians, gamers, and budget-conscious audiophiles who need accurate and clear sound reproduction without investing heavily. Its neutral signature aids monitoring tasks, while the accessory package enhances usability from the outset.
For general music enjoyment, especially vocal-focused genres, and casual mixing, the headphones perform admirably. The bass is slightly lean compared to higher-end models but remains punchy enough for most purposes. The semi-open design reduces the sense of isolation, suggesting less suitability for noisy environments or situations demanding absolute sound isolation.
Limitations and Final Thoughts
Despite the favourable sonic character and great value, the HD-681 Evo has its compromises. The fragile cable jack remains a recurring concern, and extended wearing sessions can introduce discomfort to some users. The plastic construction and visible cable vulnerability mean it is not built for heavy-duty professional wear without modifications.
Nonetheless, for the remarkably low price point, the Superlux HD-681 Evo BK provides unexpected sound quality and flexibility. Users open to minor EQ adjustments or light modifications will benefit from a budget monitor that compares favourably with many models several times its cost. Considering these factors, the headphones represent a compelling option for those prioritising sound clarity and value over premium materials or extended durability.
