Superlux HD681 Semi‑Open Studio Headphones 50mm Drivers

Superlux HD681 are semi-open over-ear studio headphones built for detailed monitoring with 50mm neodymium drivers and a long single-sided cable.

These wired headphones blend a wide 10–30,000 Hz frequency response with a 50 mm driver design to deliver a clear, balanced soundstage for mixing, tracking, podcasting, and critical listening. The semi-open architecture preserves a sense of space while maintaining enough isolation for focused work, and the lightweight, self-adjusting headband keeps sessions comfortable. With a 2.5 m straight cable and screw-on gold-plated stereo mini plug, the HD681 suit studio desks, control rooms, and home setups that need flexible cable routing.

How do the HD681 reproduce low end and detail?

The HD681 use Ø50 mm neodymium drivers tuned to emphasize deep, controlled bass while retaining clear mids and crisp highs. The reported 10–30,000 Hz range means they can capture wide spectral detail that helps reveal texture in recordings without sounding overblown.

• 50 mm neodymium drivers for robust low-frequency impact
• 10–30,000 Hz frequency range for extended treble and sub-bass
• Semi-open design preserves natural soundstage and layering
• Balanced tuning suitable for genres from classical to electronic

Are these headphones comfortable for long sessions?

Comfort is a focus: the HD681 incorporates a self-adjusting headband and soft vinyl earpads to reduce pressure during extended use. The lightweight build lowers fatigue, making these headphones suitable for multi-hour tracking, mixing, or podcast sessions.

• Self-adjusting headband adapts to head shape automatically
• Soft leather-like (vinyl) earpads cushion ears for longer wear
• Lightweight frame minimizes clamping force and heat
• Over-ear cups help distribute pressure evenly around ears

How practical are they in a studio environment?

Built with studio workflow in mind, the HD681 offers a long 2.5 m single-sided cable that keeps the desk area tidy and allows freedom of movement. The 32 Ω impedance and 300 mW maximum power make them compatible with most audio interfaces, headphone amps, and portable players without needing heavy amplification.

• 2.5 m straight single-sided cable reduces tangles and clutter
• Gold-plated screw-on stereo mini plug provides reliable contact
• 32 Ω impedance fits common audio gear and portable devices
• 300 mW max input for handling peaks without distortion

What practical listening scenarios work best with semi-open phones?

Semi-open headphones like the HD681 shine where a realistic sense of space and instrument separation are valued, such as mixing orchestral tracks, reference monitoring, or immersive music listening. They trade some external isolation for a more natural soundstage, so they're ideal in quiet or controlled studio environments.

• Mixing and mastering where stereo imaging matters
• Tracking and reference listening in treated rooms
• Podcast editing and voice-over when natural timbre helps decisions
• Casual critical listening for classical and acoustic music

Who is this for? The Superlux HD681 are aimed at musicians, engineers, podcasters, and serious listeners who want a cost-effective studio headphone with pronounced low-end, extended frequency response, and comfortable long-wear ergonomics. If you need semi-open headphones that combine a broad soundstage, durable single-sided cabling, and compatibility with common audio equipment, the HD681 offer a practical, performance-focused option for home studios and semi-professional setups.