Sennheiser
Time to switch. Distraction OFF. Open sound ON.
HD 620S Audiophile Headphones
The closed-back Sennheiser HD 620S caters to audio enthusiasts seeking distraction-free immersion without compromising on a natural, expansive sound.
The reference-grade 42mm transducer with 38mm diaphragm and ultra-light 150-ohm aluminum voice coil delivers exceptional impulse response and smooth sound for which the entire 600-series is renowned. Even in complex music, bass, mids, and vocals are delightfully layered with distinct instrumentation and nuance.
Featuring an open baffle and angled transducers, the HD 620S replicates the spatial imaging of loudspeakers while keeping listening sessions secluded. Steel-reinforced components and supple, artificial leather earpads guarantee long-term durability, reduced resonances, and all-day comfort.
Tech Specs
- Headphone Type: Wired Over-Ear
- Connection Type: 3.5mm plug (unbalanced)
- Impedance: 150 Ω
- Driver Diameter: 38mm
- THD: <0.05% (1 kHz / 90 dB SPL)
- Sound Pressure Level: 110 dB (1 kHz / 1 Vrms)
- Frequency Response: 6Hz - 30KHz
- Acoustic Principle: Closed-back
- Ear Cushion Material: Artificial leather
What's in the box
- HD 620S headphones
- 1.8 m cable with 3.5 mm straight plug
- 3.5 mm to 6.35 mm screw-on adapter
- Storage pouch
- Documentations
HD 620S
Who says closed-back headphones can’t sound that open? The closed-back HD 620S is for audio enthusiasts seeking a distraction-free listening experience without compromising on natural, airy and detailed sound. Featuring a remarkably open baffle and angled transducers, it replicates the spatial imaging of loudspeakers while keeping listening sessions secluded.
“The HD 620S certainly offer an airy and spacious sound” and “The build quality is solid”
What Hi-Fi?, 06/2024
Features
Here are the reasons why?
- Distraction-free immersion
- Natural, detailed sound
- Wide, spacious soundstage
- Lightweight, comfortable, long-lasting design
Kitchen talk OFF. Sofa concert ON.
Enjoy undisturbed privacy while listening to exceptional open, natural sound.
Want immersive, studio-quality sound without sacrificing privacy? The HD 620S delivers. Its closed-back design and stainless-steel ear cup covers offer a detailed, spacious soundstage while keeping your audio to yourself. Enjoy true-to-life vocals and distraction-free sessions—perfect for sofa concerts and reliving live moments. Who says closed-back cans can’t sound this real?
Distraction OFF. Open sound ON.
Open sound in a closed-back design.
Think closed-back headphones can’t sound open? Think again. The HD 620S blends the natural tonal purity of the HD 600 with the immersive soundstage of the 500 series—all in a sealed design. Its reference-grade 42 mm angled transducers (38 mm diaphragm) and ultra‑light 150 Ω aluminum voice coil deliver fast, detailed response and panoramic imaging, offering rare open-like depth in a closed-back pair. It redefines what closed cans can do.
Stressful life OFF. Peace of mind ON.
No matter whether all day, all week or all year.
Timeless design, lasting comfort—meet the HD 620S. Lightweight yet sturdy, its steel-reinforced sliders and ear-cup covers ensure durability and a consistently rich acoustic signature. Spacious ear cups, ventilated artificial-leather pads, and a softly cushioned headband deliver superb isolation and fatigue-free comfort—even during hours of intimate listening. Focus on the music, not upkeep. Ready for sofa sessions that last all day?
Key clicks OFF. Full immersion ON.
Your passion knows no boundaries. Why should your headphones?
Craving some undisturbed me-time away from roommates or family? The HD 620S lets you stay present while enjoying full privacy and immersive, natural sound. Whether you're gaming, making music, or just love great audio, it elevates every detail and emotion. Ready for next-level sound? Switch to the HD 620S.
Frequency response curve
Describing the HD 620S sound
Reference Sound
Overall, the frequency response (FR) of the HD 620S is fairly close to the reference HD 600, which suggests a very neutral true-to-life sound reproduction.
Accurate Bass
The most significant deviation is in the bass below 100 Hz. The weak point of the HD 600 is a relatively low bass response for modern consumer taste. The HD 620S has significantly enhanced performance in this area thanks to being a closed-back headphone.
Brilliant, smooth treble
The most impressive feature of the HD 620S as a closed headphone is the response above 4000 Hz: it’s exceptionally smooth and well extended to the highest frequencies. Almost all competitors have either considerably less high treble (less detailed sound) or an uneven response (visual spikes, which translates to some instruments being unnaturally loud.)
More Information
What you need to know
Does the HD 620S have a closed-back design?
Yes, The HD 620S has a closed-back design to provide a distraction-free listening experience.
The sound of the HD 620S can be best described as ...
The HD 620S produces an airy sound with natural tonality.
Which of these SOUND features does the HD 620S have?
- Sennheiser signature sound
- Speaker-like panoramic imaging
- DNA from the 600-series
- Ultra-low distortion
- Substantial bass
To connect to an audio source the HD 620S cable has what type of plug?
The unbalanced 3.5 mm plug and screw-on adapter (3.5 mm to 6.35 mm) lets you connect to a multitude of audio devices. The 1.8-meter cable is an ideal length for desktop use.
The HD 620S has an impedance of ...?
The HD 620S has an impedance of 150 Ω (Ohms) which ensures consistent performance with many sources, including tube amplifiers.
Which of these COMFORT features does the HD 620S have?
- Closed-back design
- Ergonomic headband
- Lightweight chassis
- Artificial leather earpads
- Detachable cables
Does the HD 620S have the option for a balanced cable?
A balanced cable with a 4.4 mm plug is sold separately as an optional accessory.
Which of these CRAFTSMANSHIP features does the HD 620S have?
- German design & engineering
- 42 mm transducer
- Aluminum voice coil
- Outstanding build quality
Where is the HD 620S designed and engineered?
The HD 620S is designed and engineered in Germany.
© Sonova Consumer Hearing GmbH
