Superlux HD-681 Semi-Open Studio Headphone

The HD681 headphones feature a semi-open design intended for use in professional monitoring applications. These headphones feature premium quality audio components paired with an ergonomic design. The self-adjusting headband provides the listener with a great fit and these durable headphones can even be twisted for use in single ear monitoring. The HD681professional headphones are lightweight and enable long sessions without experiencing ear fatigue.

Special attention has been paid to the materials and construction of the earmuffs which make them easily adjustable and exceptionally comfortable. The HD681features 50mm dome type neodymium drivers, a10 Hz - 30 kHz frequency range and total harmonic distortion of less than 0.25%. They deliver a rich balanced sound with high resolution, wide dynamic range and excellent stereo imaging.
Shipped with a protective storage pouch and gold-plated3.5mm to 1/4 inch screw-on adapter, the HD681headphones are an excellent choice for a wide range of audio listening tasks, including recording studio monitors, headphones for MP3 players or video games, computer/digital audio or any pro audio application.

Key Features

• 50mm Neodymium Drivers: Premium dome-type drivers deliver rich, balanced sound with exceptional detail and accuracy
• Extended Frequency Range: 10Hz to 30kHz response captures full audio spectrum from deep sub-bass to ultra-high frequencies
• Semi-Open Design: Balanced acoustic architecture provides spacious soundstage with natural sound reproduction
• High Sensitivity: 98 dB SPL/mW efficiency delivers powerful output even from portable devices and audio interfaces
• Low Impedance: 32 Ohms rated impedance ensures compatibility with smartphones, MP3 players, computers, and professional equipment
• Ultra-Low Distortion: Less than 0.25% THD maintains audio integrity at all listening levels
• Self-Adjusting Headband: Automatic fit adjustment provides optimal comfort for any head size without manual adjustment
• Ergonomic Earmuffs: Carefully engineered materials and construction prevent ear fatigue during extended use
• Twistable Design: Flexible construction allows single-ear monitoring for DJ and recording applications
• Lightweight Construction: 220g weight (7.8 oz) enables comfortable all-day wear without listener fatigue
• Long Cable: Single-sided 2.5-meter (8.2-foot) straight cable provides ample length for studio and mobile use
• Gold-Plated Connectors: 3.5mm (1/8"") mini jack with included screw-on 6.35mm (1/4"") adapter for universal compatibility
• Professional Applications: Ideal for recording studio monitoring, mixing, gaming, MP3 players, and pro audio tasks

Technical Specifications

• Driver Type: Dynamic, Semi-open
• Driver Size: 50mm dome type with neodymium magnet
• Sensitivity: 98 dB (SPL/mW)
• Frequency Range: 10 Hz to 30,000 Hz (10Hz - 30kHz)
• Rated Impedance: 32 Ohms
• Total Harmonic Distortion (THD): <0.25%
• Maximum Input Power: 300 mW
• Cable Type: Single-sided, straight design
• Cable Length: 2.5 meters (8.2 feet)
• Connector: Gold-plated stereo 3.5mm (1/8"") mini jack
• Adapter: Screw-on gold-plated stereo 3.5mm to 6.35mm (1/4"") phone adapter
• Weight: 220 grams (7.8 ounces)
• Headband: Self-adjusting design
• Acoustic Design: Semi-open circumaural

Package Contents

• Superlux HD-681 semi-open studio headphones
• Gold-plated 3.5mm to 6.35mm (1/8"" to 1/4"") screw-on adapter
• Protective storage pouch
• User documentation