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Dan Clark Audio Aeon Flow Open vs Sennheiser HDB 630: which should you buy?

On aggregated review scores the Sennheiser HDB 630 comes out ahead with a HearWiki score of 86. The full breakdown - sub-scores, specs and what reviewers actually said - is below.

Our pick: Sennheiser HDB 630 - Outstanding overall at around $450.

Score breakdown

Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.

Sennheiser HDB 630 leads on 7 of 7 measures.

  • Dan Clark Audio Aeon Flow Open
  • Sennheiser HDB 630
HearWiki score
52
86
Sound
7.0
9.4
Noise cancelling
-
8.2
Battery
-
9.7
Calls
-
8.5
Value
3.8
8.4
Price (USD)
$800
$450

Generation & platform

The scores rank quality. This is the other question: is the newer one actually newer technology, or the same platform in a new shell?

Half a step newer

Sennheiser HDB 630 (2025) against Dan Clark Audio Aeon Flow Open (2018). The Sennheiser HDB 630 edges ahead on platform, but only just: ANC type Adaptive against None. It also adds USB-C.

  • Aeon Flow Open2018
  • HDB 63020257 yr newer
What differsAeon Flow OpenHDB 630

Platform

ANC type
None
Adaptive

Everyday features

USB-C
No
Yes

Specifications

Aeon Flow OpenHDB 630
Type
Over-Ear
Over-Ear
Price (USD)
$800
$450
HearWiki score
52
86
Released
2018
2025
Availability
Discontinued
Sold new
Driver
62 mm planar magnetic
42 mm dynamic
Driver type
planar
dynamic
Driver size
62 mm
42 mm
Drivers per side
1
1
Frequency response
-
6 Hz - 40 kHz
Sound signature
-
neutral
Impedance
13 Ω
480 Ω
Sensitivity
95 dB/mW
105 dB/mW
Bluetooth
-
5.2
Codecs
-
SBC, AAC, aptX, aptX HD, aptX Adaptive
Multipoint pairing
-
Yes
Battery life
-
60 h
Battery life (ANC on)
-
60 h
Full charge time
-
120 min
Quick charge
-
10 min → 7 h
Wireless charging
-
No
Active noise cancelling
No
Yes
ANC type
-
adaptive
Transparency mode
-
Yes
Companion app
-
Yes
Custom EQ
-
Yes
Wear detection
-
Yes
Controls
-
touch
Voice assistant
-
Yes
Weight
321 g
311 g
Water resistance
-
none
Detachable cable
Yes
Yes
USB-C
No
Yes
Connector
6.35 mm
3.5 mm
Microphones
-
4

What reviewers said

Dan Clark Audio Aeon Flow Open

The Dan Clark Audio Aeon Flow Open is a wired, open-back planar magnetic headphone that delivers a warm, smooth, and engaging listening experience. Its low 13-ohm impedance makes it easy to drive, and the lightweight 321g frame, combined with plush padding, ensures exceptional comfort for long sessions. While it lacks a massive soundstage compared to some open-back rivals, its relaxed tuning and built-in tuning filters offer versatile customization for a satisfying, easygoing sound.

  • Pro:Warm, smooth, and engaging sound signature
  • Pro:Exceptionally comfortable with lightweight build
  • Pro:Easy to drive thanks to low impedance
  • Con:Soundstage is more intimate than some competitors
  • Con:Detail retrieval falls slightly short of top-tier rivals
  • Con:Wired-only design with no ANC or USB-C connectivity

Sennheiser HDB 630

The Sennheiser HDB 630 is a premium wireless over-ear headphone that prioritizes audio fidelity above all else, pairing a detailed 42 mm driver with adaptive noise cancellation and extensive aptX codec support. Its standout feature is the bundled BTD 700 dongle, which unlocks high-resolution wireless performance, while a long 60-hour battery life and comfortable fit make it suitable for extended listening sessions. Though it lacks water resistance and wireless charging, its balanced tuning and engaging sound make it a top choice for audiophiles on the go.

  • Pro:Excellent, balanced sound quality
  • Pro:Adaptive ANC with strong performance
  • Pro:Support for aptX Adaptive and aptX HD
  • Con:No water resistance
  • Con:No wireless charging
  • Con:Some noticeable sonic quirks in certain settings

Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.

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