Sennheiser HD 620S

Sennheiser HD 620S Closed-Back Headphones

Sennheiser has just unveiled its latest closed-back headphone model: the HD 620S. Designed for audiophiles and music enthusiasts, these headphones promise an immersive and high-quality listening experience, even in noisy environments. They complement Sennheiser’s renowned HD 600 series, celebrated for its sonic excellence for many years.

Cutting-Edge Technology

At the heart of the HD 620S lies a 42 mm dynamic transducer specially developed by Sennheiser. With its 150 Ω aluminum voice coil and 38 mm diaphragm, it offers exceptional impulse response, ensuring fast, accurate, and detail-rich sound across the entire spectrum.

The transducers are positioned at a carefully calculated angle, reproducing the triangular sound image of a high-end speaker setup in a perfectly acoustically treated room. This immersive presentation places the listener at the center of the action, with precise localization of sound sources.

Effective Sound Isolation

Unlike open-back headphones often favored by audiophiles for their natural rendering and wide soundstage, the HD 620S opts for a closed-back design. This allows it to provide excellent sound isolation, essential for immersing oneself in music without being disturbed by ambient noise, or for listening at high volumes without disturbing others.

The reinforced steel earcups play an important acoustic role, efficiently managing internal reflections that could alter the purity of the signal. The angled baffle promotes free air circulation, mimicking the behavior of open-back transducers.

Natural and Detailed Sound

Thanks to its unique design, the Sennheiser HD 620S manages to combine the advantages of open and closed-back headphones. It delivers a natural, airy, and detailed sound, with a wide soundstage that defies the usual limitations of closed-back models. Audiophiles can thus enjoy faithful and immersive reproduction without compromising on sound isolation.

The extended frequency response and low distortion across the spectrum ensure great clarity in the highs, rich and nuanced mids, as well as deep and articulate bass. Each note is reproduced with surgical precision, preserving all the emotional subtleties of the music.

Elegant and Comfortable Design

The Sennheiser HD 620S sports a sleek and elegant look, true to the brand’s visual identity. Its reinforced steel headband and metal earcups provide great robustness while maintaining a certain lightness for optimal comfort. The leatherette ear pads with internal ventilation perfectly envelop the ears, allowing for long listening sessions without fatigue.

The 1.8-meter detachable cable terminates in a locking 3.5 mm jack, with a 6.3 mm adapter included. A 4.4 mm balanced cable will also be available as an option this summer for users of hi-fi devices compatible with this increasingly popular format.

Versatile and Durable Headphones

With its 150-ohm impedance, the HD 620S is easily driven by most integrated amplifiers and portable devices. It is equally suitable for music lovers seeking to isolate themselves for attentive listening at home, and for creatives on the go looking for a reliable and high-performance tool for their work.

The headphone’s robust construction, with its reinforced headband and metal ear cups, ensures great durability. The included storage pouch protects it from dust when not in use, while providing ample space to store the detachable cable.

In summary, the Sennheiser HD 620S stands out for its:

• Elegant and comfortable design, suitable for long listening sessions
• High-performance 42 mm dynamic transducers, for fast and detailed sound
• Excellent sound isolation, thanks to its closed-back design and steel ear cups
• Wide and immersive soundstage, rare for a closed-back headphone
• Extended frequency response and low distortion, for natural and faithful reproduction
• Equally suited for audiophile listening and professional use
• Robust and durable construction, with quality materials

Technical Specifications

Acoustic Configuration

• Type: Circumaural
• Acoustic Principle: Closed
• Cushion Material: Synthetic Leather

Transducers

• Type: Dynamic (single transducer)
• Diameter: 42 mm with 38 mm diaphragm

Audio Performance

• Frequency Response: 6 Hz - 30,000 Hz
• Impedance: 150 Ω
• Sound Pressure Level (SPL): 105 dB (1 kHz / 1 V RMS)
• Total Harmonic Distortion (THD): < 0.05% (1 kHz / 90 dB SPL)
• Magnetic Field Strength: 6.25 mT

Physical Characteristics

• Packaging Dimensions: 237 × 191 × 96 mm
• Weight without Cable: 326 g

Box Contents

• HD 620S Closed-Back Headphones
• 1.8 m Cable with 3.5 mm Mini-Jack Connector
• 3.5 mm Mini-Jack to 6.35 mm Jack Adapter