HD 620S

Released June 2024

The HD 620S are Sennheiser's closed-back wired headphones from the HD 600 series, with angled 150-ohm transducers in an HD 500-style chassis, suited to listeners who want isolation at home or at a desk.

Type: Over-ear
Noise cancelling: No
Battery: –
With case: –
Best codec: Wired
Weight: 326 g

Over-ear

What reviewers say

Reviewers agree the sound is detailed, smooth and unusually spacious for closed-back headphones, and that they are sturdily built. What Hi-Fi? wanted more punch and dynamics and found the clamping force firm; TechRadar found the isolation only moderate, and Headfonics noted some flex noise from the housing.

From whathifi.com, techradar.com and headfonics.com

Specifications

Report a wrong or missing spec

Sound

Type: Over-ear
Noise cancelling: No
Driver size: 38 mm
Back: Closed
Impedance: 150 ohms
Bluetooth codecs: None (wired)
Drivers: Dynamic, closed; 42 mm angled transducers with 38 mm diaphragm and 150-ohm aluminium voice coil, made in Tullamore, Ireland; 6 Hz – 30 kHz; 110 dB SPL (1 Vrms); THD < 0.05% (1 kHz, 90 dB SPL); steel plate closing off the back volume

Battery

Listening time (maker's claim): No battery (wired)

Design

Weight: 326 g
Headphone cable: Yes
Fit and ear tips: Over-ear (around the ear), closed-back; artificial leather ear pads with internal venting; steel-reinforced headband sliders and ear cup covers; weight 326 g without cable, from Headfonics (Sennheiser doesn't publish it)
Works with: Detachable 1.8 m twist-lock cable with 3.5 mm plug and locking screw; screw-on 3.5 mm to 6.3 mm adapter; optional balanced 4.4 mm cable
In the box: HD 620S headphones, 1.8 m cable with 3.5 mm plug, 3.5 to 6.3 mm adapter; the launch press release also lists a storage pouch

Pros and cons

Pros

Closed back keeps sound in and outside noise out
110 dB SPL (1 Vrms) sensitivity; 6 Hz to 30 kHz
Detachable twist-lock cable with a screw-on 6.3 mm adapter

Cons

Heavier than the open HD 600 series at 326 g (Headfonics)
Only a 3.5 mm cable in the box; the balanced 4.4 mm cable is sold separately

Closest rivals

Model	Type	Noise cancelling	Battery	With case	Best codec	Weight	Released
beyerdynamicDT 1770 PRO MKII	Over-ear	No	–	–	Wired	377 g	Oct 2024
beyerdynamicDT 1990 PRO MKII	Over-ear	No	–	–	Wired	376 g	2024
beyerdynamicDT 770 PRO X Limited Edition	Over-ear	No	–	–	Wired	305 g	Apr 2024

Sources

Photo: Sennheiser official HD 620S product photograph; complete supplied white canvas retained.

HD 620S side view: Sennheiser official HD 620S product photograph; supplied framing and background retained.
HD 620S front view: Sennheiser official HD 620S product photograph; supplied framing and background retained.
HD 620S laid on a sofa beside a woven throw: Sennheiser official HD 620S product photograph; supplied framing and background retained.
HD 620S worn at a gaming desk: Sennheiser official HD 620S product photograph; supplied framing and background retained.
HD 620S held to show its ear cushion and driver grille: Sennheiser official HD 620S product photograph; supplied framing and background retained.
HD 620S worn while reclining on a sofa: Sennheiser official HD 620S product photograph; supplied framing and background retained.
HD 620S worn by a listener sitting beside a cabinet: Sennheiser official HD 620S product photograph; supplied framing and background retained.
HD 620S worn while using a tablet at a table: Sennheiser official HD 620S product photograph; supplied framing and background retained.
HD 620S worn while using a laptop on a sofa, front view: Sennheiser official HD 620S product photograph; supplied framing and background retained.
HD 620S worn while using a laptop on a sofa, side view: Sennheiser official HD 620S product photograph; supplied framing and background retained.
HD 620S worn while sitting cross-legged on a rug: Sennheiser official HD 620S product photograph; supplied framing and background retained.

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