OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Portable Speakers Methodology v1.0
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Products in this category are scored under Frontum Portable Speakers Methodology v1.0: technical specifications plus authentic consumer ratings, with 0% commercial bias.
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Harman Kardon Onyx Studio 9 Review | 130 Data compared

Avg. price:~£220Audio output power:50.00 WBattery life:8 hoursIP rating:?Bluetooth version:5.3Weight:3360 g

Harman Kardon Onyx Studio 9 Review: Compare 130 technical specifications and user reviews to see how this product ranks in the Portable Speakers category and whether it is worth buying.

Harman Kardon Onyx Studio 9
7.2/10

Overall score

Score
7.2/ 10
✕
What it is
An overall evaluation of products in the Portable Speakers category, based on technical analysis and user reviews.
When it matters
When you need a quick reference for identifying the best products in the Portable Speakers category.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 79% of models
Score components

80%

6.8

Technical score

20%

8.8

User score

â–²Better than 79% of portable speakers
7.9

Value for money

Value for money
7.9/ 10
✕
What it is
An indicator that combines the overall score of products in the Portable Speakers category with their prices.
When it matters
When you are comparing products in the Portable Speakers category and want a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 76% of models
Score components

70%

7.2

Overall score

30%

9.4

Price

â–²Better than 76%
6.8

Technical score

Technical score
6.8/ 10
✕
What it is
An assessment of technical performance for products in the Portable Speakers category across these key areas: Audio, Connectivity, Battery, Durability, Controls, Design, Smart features.
When it matters
When you want to compare products in the Portable Speakers category by technical performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 67% of models
Score components

32%

7.1

Audio

20%

6.9

Battery

18%

5.8

Durability

16%

6.7

Connectivity

8%

9.0

Controls

3%

5.8

Design

3%

6.0

Smart features

â–²Better than 67%
8.8

User score

User score
8.8/ 10
✕
What it is
A rating that combines user reviews with the total review volume for products in the Portable Speakers category.
When it matters
When you want to know how products in the Portable Speakers category perform in everyday use and how reliable owners find them over time.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 84% of models
Score components

70%

9.2

User ratings

30%

7.9

Number of reviews

Based on ratings from across the web.
â–²Better than 84%
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Where to buy
*As an Amazon Associate, we earn from qualifying purchases.
Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Portable Speakers model ranking

Ranked #223 of 1,316 models in Portable Speakers (Overall score)

Technical Specifications of portable speaker Harman Kardon Onyx Studio 9

Technical score
Technical score
6.8/ 10
✕
What it is
An assessment of technical performance for products in the Portable Speakers category across these key areas: Audio, Connectivity, Battery, Durability, Controls, Design, Smart features.
When it matters
When you want to compare products in the Portable Speakers category by technical performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 67% of models
Score components:

32%

7.1

Audio

20%

6.9

Battery

18%

5.8

Durability

16%

6.7

Connectivity

8%

9.0

Controls

3%

5.8

Design

3%

6.0

Smart features

6.8
User score
User score
8.8/ 10
✕
What it is
A rating that combines user reviews with the total review volume for products in the Portable Speakers category.
When it matters
When you want to know how products in the Portable Speakers category perform in everyday use and how reliable owners find them over time.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 84% of models
Score components

70%

9.2

User ratings

30%

7.9

Number of reviews

Based on ratings from across the web.
8.8
Popularity
Popularity
7.9/ 10
✕
What it is
An indicator based on the number of reviews received by products in the Portable Speakers category.
When it matters
When you prefer products in the Portable Speakers category that have been chosen and reviewed by many other buyers.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 77% of models
Popularity:
Harman Kardon Onyx Studio 9 has a popularity score of 7.9 points, which is higher than 77.1% of products in this category.
7.9
Value for money
Value for money
7.9/ 10
✕
What it is
An indicator that combines the overall score of products in the Portable Speakers category with their prices.
When it matters
When you are comparing products in the Portable Speakers category and want a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 76% of models
Score components:

70%

7.2

Overall score

30%

9.4

Price

7.9
Audio output power
50 W
Market range: <4 W – >100 W
This portable speaker has an audio output power of 50 W which is higher than that of 75.8% of portable speakers and equal to that of 3.3% of portable speakers.
Driver unit size
?
Number of drivers
3
Market range: <0 – >5
This portable speaker has 3 drivers, which is more than 70.1% of portable speakers and equal to the number in 11.5% of portable speakers.
Frequency response tolerance
?
Lowest frequency
50 Hz
Market range: <20 Hz – >120 Hz
This portable speaker has a lowest frequency of 50 Hz which is lower than that of 59.9% of portable speakers and equal to that of 9.1% of portable speakers.
Show more
Bluetooth connectivity
yes
This portable speaker supports Bluetooth audio. 5.4% of portable speakers offer this feature.
Bluetooth version
5.3
Market range: <3 – >5.3
This portable speaker supports Bluetooth version 5.3 which is newer than that of 78.7% of portable speakers and equal to that of 17.6% of portable speakers.
Maximum Bluetooth range
10 m
Market range: <10 m – >30 m
This portable speaker has a maximum Bluetooth range of 10 m which is longer than that of 4.3% of portable speakers and equal to that of 70.2% of portable speakers.
Bluetooth profiles supported
A2DP; AVRCP
Bluetooth LE Audio
?
Show more
Battery life
8 hours
Market range: <6 hours – >24 hours
This portable speaker has a battery life of 8 hours which is shorter than that of 68.9% of portable speakers and equal to that of 11.6% of portable speakers.
Battery capacity
4,722 mAh
Market range: <900 mAh – >6.6k mAh
This portable speaker has a battery capacity of 4,722 mAh which is larger than that of 77.8% of portable speakers and equal to that of 0.2% of portable speakers.
Charging time
4 hours
Market range: <2 hours – >5 hours
This portable speaker has a charging time of 4 hours which is longer than that of 67% of portable speakers and equal to that of 19.3% of portable speakers.
Maximum charging input power
38 W
Market range: <5 W – >30 W
This portable speaker has a maximum charging input power of 38 W which is higher than that of 93.3% of portable speakers and equal to that of 0.4% of portable speakers.
Built-in rechargeable battery
yes
This portable speaker has a built-in rechargeable battery. 18.7% of portable speakers offer this feature.
Show more
IP rating
?
Water resistance
no
This portable speaker is not water resistant. 61.7% of portable speakers offer this feature.
Dust resistance
no
This portable speaker is not rated as dust resistant. 51.5% of portable speakers offer this feature.
Waterproof depth rating
?
Drop resistance
no
This portable speaker lacks an impact-resistance rating. 32.8% of portable speakers offer this feature.
Show more
On-device controls placement
top
Touchscreen
no
This portable speaker does not have a touchscreen. 0.3% of portable speakers offer this feature.
Smartphone app control
yes
This portable speaker supports smartphone app control. 46.1% of portable speakers offer this feature.
Compatible mobile app provides speaker control or settings.
Remote control
no
This portable speaker does not include a remote control. 15% of portable speakers offer this feature.
Fast pairing
?
Show more
Weight
3,360 g
Market range: <200 g – >5.6k g
This portable speaker weighs 3,360 g which is heavier than that of 83.1% of portable speakers.
Height
28.75 cm
Market range: <5.79 cm – >29 cm
This portable speaker has a height of 28.75 cm which is taller than that of 89.8% of portable speakers.
Width
28.92 cm
Market range: <7.6 cm – >37 cm
This portable speaker has a width of 28.92 cm which is wider than that of 77.7% of portable speakers.
Depth
13 cm
Market range: <4.3 cm – >19.97 cm
This portable speaker has a depth of 13 cm which is deeper than that of 72% of portable speakers and equal to that of 0.7% of portable speakers.
Carry options
handle
Show more
Companion app name
Harman Kardon One
Firmware updates
yes
This portable speaker supports firmware updates. 52.9% of portable speakers offer this feature.
Supports user-accessible firmware updates.
Firmware update method
OTA; App
Voice assistant support
no
This portable speaker does not support voice assistants. 26.5% of portable speakers offer this feature.
Spotify Connect
no
This portable speaker does not support Spotify Connect. 10.8% of portable speakers offer this feature.
Show more

Harman Kardon Onyx Studio 9 vs the average portable speaker

246810TotalAudioConnectivityBatteryDurabilityControlsDesignSmart features
  • 30 W more audio output power
    This portable speaker has more audio output power than the average portable speaker (50 W vs 20 W).
    50 W vs 20 W
  • 1 more multipoint connections
    This portable speaker has more multipoint connections than the average portable speaker (2 vs 1).
    2 vs 1
  • 7 more adjustable EQ bands
    This portable speaker has more adjustable EQ bands than the average portable speaker (7 vs 0).
    7 vs 0
  • 28 W higher charging input power
    This portable speaker has higher charging input power than the average portable speaker (38 W vs 10 W).
    38 W vs 10 W
  • 2,122 mAh more battery capacity
    This portable speaker has a larger battery capacity than the average portable speaker (4,722 mAh vs 2,600 mAh).
    4,722 mAh vs 2,600 mAh
  • 4 more EQ presets
    This portable speaker has more EQ presets than the average portable speaker (4 vs 0).
    4 vs 0
  • Has built-in stereo speakers
    This portable speaker has built-in stereo speakers, while the average portable speaker does not have built-in stereo speakers.
    Provides true stereo output within the unit.
  • Has an equalizer
    This portable speaker has an equalizer, while the average portable speaker does not have an equalizer.
    Offers user-selectable EQ, tone adjustment, or sound presets.
  • 10.3% higher user score
    User score
    8.8/ 10
    ✕
    What it is
    A rating that combines user reviews with the total review volume for products in the Portable Speakers category.
    When it matters
    When you want to know how products in the Portable Speakers category perform in everyday use and how reliable owners find them over time.
    Score distribution
    â–¼
    â–¼
    <55-66-77-88-99-10
    Harman Kardon Onyx Studio 9
    the average portable speaker
    Harman Kardon Onyx Studio 9 has a higher user score than the average portable speaker (8.83 vs 8).
    8.83 vs 8
  • 30 W more audio output power
    This portable speaker has more audio output power than the average portable speaker (50 W vs 20 W).
    50 W vs 20 W
  • Has built-in stereo speakers
    This portable speaker has built-in stereo speakers, while the average portable speaker does not have built-in stereo speakers.
    Provides true stereo output within the unit.
  • 0.9 % lower total harmonic distortion
    This portable speaker has lower total harmonic distortion than the average portable speaker (0.1 % vs 1 %).
    0.1 % vs 1 %
  • 1 more speaker drivers
    This portable speaker has more speaker drivers than the average portable speaker (3 vs 2).
    3 vs 2
  • 61 ms lower audio latency
    This portable speaker has lower audio latency than the average portable speaker (24 ms vs 85 ms).
    24 ms vs 85 ms
  • 10 Hz deeper bass extension
    This portable speaker has deeper bass extension than the average portable speaker (50 Hz vs 60 Hz).
    50 Hz vs 60 Hz
  • 1 more multipoint connections
    This portable speaker has more multipoint connections than the average portable speaker (2 vs 1).
    2 vs 1
  • Supports Auracast
    This portable speaker supports Auracast, while the average portable speaker does not support Auracast.
  • Has a USB Type-C port
    This portable speaker has a USB Type-C port, while the average portable speaker does not have a USB Type-C port.
    Has a physical USB-C port.
  • 0.3 Bluetooth levels newer
    This portable speaker has a newer Bluetooth version than the average portable speaker (5.3 vs 5).
    5.3 vs 5
  • 28 W higher charging input power
    This portable speaker has higher charging input power than the average portable speaker (38 W vs 10 W).
    38 W vs 10 W
  • 2,122 mAh more battery capacity
    This portable speaker has a larger battery capacity than the average portable speaker (4,722 mAh vs 2,600 mAh).
    4,722 mAh vs 2,600 mAh
  • Has a power bank function
    This portable speaker has a power bank function, while the average portable speaker does not have a power bank function.
  • Has a removable battery
    This portable speaker has a removable battery, while the average portable speaker does not have a removable battery.
  • Includes a power adapter
    This portable speaker includes a power adapter, while the average portable speaker does not include a power adapter.
  • 7 more adjustable EQ bands
    This portable speaker has more adjustable EQ bands than the average portable speaker (7 vs 0).
    7 vs 0
  • 4 more EQ presets
    This portable speaker has more EQ presets than the average portable speaker (4 vs 0).
    4 vs 0
  • Has an equalizer
    This portable speaker has an equalizer, while the average portable speaker does not have an equalizer.
    Offers user-selectable EQ, tone adjustment, or sound presets.
  • Supports party mode
    This portable speaker supports party mode, while the average portable speaker does not support party mode.
    Supports synchronized multi-speaker party/group playback.
  • Supports automatic room calibration
    This portable speaker supports automatic room calibration, while the average portable speaker does not support automatic room calibration.
  • Supports firmware updates
    This portable speaker supports firmware updates, while the average portable speaker does not support firmware updates.
    Supports user-accessible firmware updates.
  • 5 newer
    This portable speaker was released more recently than the average portable speaker (2024 vs 2019).
    2024 vs 2019
  • Is not water resistant
    This portable speaker is not water resistant, while the average portable speaker is water resistant.
  • Is not rated as dust resistant
    This portable speaker is not rated as dust resistant, while the average portable speaker is dust resistant.
  • 1 fewer microphones
    This portable speaker has fewer microphones than the average portable speaker (0 vs 1).
    0 vs 1
  • 4 hours shorter battery life
    This portable speaker has a shorter battery life than the average portable speaker (8 hours vs 12 hours).
    8 hours vs 12 hours
  • 1 hours longer charging time
    This portable speaker has a longer charging time than the average portable speaker (4 hours vs 3 hours).
    4 hours vs 3 hours
  • 4 dB SPL lower maximum sound pressure
    This portable speaker has a lower maximum sound pressure level than the average portable speaker (88 dB SPL vs 92 dB SPL).
    88 dB SPL vs 92 dB SPL
  • 2,560 g heavier
    This portable speaker is heavier than the average portable speaker (3,360 g vs 800 g).
    3,360 g vs 800 g
  • 16.35 cm taller
    This portable speaker is taller than the average portable speaker (28.8 cm vs 12.4 cm).
    28.75 cm vs 12.4 cm
  • 2.44x more expensive
    Harman Kardon Onyx Studio 9 is more expensive than the average portable speaker (£220 vs £90).
    £220 vs £90
  • 1 fewer microphones
    This portable speaker has fewer microphones than the average portable speaker (0 vs 1).
    0 vs 1
  • 4 dB SPL lower maximum sound pressure
    This portable speaker has a lower maximum sound pressure level than the average portable speaker (88 dB SPL vs 92 dB SPL).
    88 dB SPL vs 92 dB SPL
  • 4 hours shorter battery life
    This portable speaker has a shorter battery life than the average portable speaker (8 hours vs 12 hours).
    8 hours vs 12 hours
  • 1 hours longer charging time
    This portable speaker has a longer charging time than the average portable speaker (4 hours vs 3 hours).
    4 hours vs 3 hours
  • Is not water resistant
    This portable speaker is not water resistant, while the average portable speaker is water resistant.
  • Is not rated as dust resistant
    This portable speaker is not rated as dust resistant, while the average portable speaker is dust resistant.
  • 2,560 g heavier
    This portable speaker is heavier than the average portable speaker (3,360 g vs 800 g).
    3,360 g vs 800 g
  • 16.35 cm taller
    This portable speaker is taller than the average portable speaker (28.8 cm vs 12.4 cm).
    28.75 cm vs 12.4 cm
  • 10.82 cm wider
    This portable speaker is wider than the average portable speaker (28.9 cm vs 18.1 cm).
    28.92 cm vs 18.1 cm
  • 4.7 cm deeper
    This portable speaker is deeper than the average portable speaker (13 cm vs 8.3 cm).
    13 cm vs 8.3 cm

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Expert reviews

In-depth analysis and verdict from leading tech publications

T
trustedreviews.com
14/10/2025
Summary of the review
Harman Kardon Onyx Studio 9 Review - Trusted Reviews
T
t3.com
19/05/2025
Summary of the review
Harman Kardon Onyx Studio 9 review: Big audio that's great value
A
avforums.com
17/07/2025
Summary of the review
Harman Kardon Onyx 9 Bluetooth Speaker Review | AVForums
W
whatgadget.net
18/06/2025
Summary of the review
Harman Kardon Onyx Studio 9 Review - What Gadget RTINGS.com
S
senses.se
07/12/2025
Summary of the review
Review: Harmon/Kardon - Onyx Studio 9 - Senses.se
T
t3.com
20/06/2025
Summary of the review
I've tested many Bluetooth speakers and this 5-star one is a 2025 top pick - T3
T
test.de
23/01/2026
Summary of the review
Review: Harman Kardon Onyx Studio 9 - Stiftung Warentest
(Translated)Show original
S
satvision.de
30/05/2025
Summary of the review
Harman Kardon Onyx Studio 9 Review - SATVISION
(Translated)Show original
F
frandroid.com
16/06/2025
Summary of the review
Harman Kardon Onyx Studio 9 Review: Our Full Verdict
(Translated)Show original
L
lesnumeriques.com
20/01/2026
Summary of the review
Harman Kardon Onyx Studio 9 Review: A home Bluetooth speaker with a balanced and warm sound
(Translated)Show original
A
avpasion.com
30/05/2025
Summary of the review
Harman Kardon Onyx Studio 9 review: A Bluetooth speaker...
(Translated)Show original

Third-party reviews

Based on ratings from across the web.
Reviews last updated: August 2026 · How we calculate this

What customers like about Harman Kardon Onyx Studio 9

  • Powerful bass performance that is ideal for genres like pop and hip-hop.
  • Excellent overall sound quality with clear vocals and sharp high frequencies via three tweeters.
  • Elegant, modern circular design with a premium-feeling aluminum frame handle.
  • Integrated 7-band EQ and customization options accessible through a companion app.
  • Adaptive automatic self-tuning that seamlessly optimizes the audio output for any room.
  • Substantial battery upgrade compared to previous generations, delivering roughly 8 hours of playback.
  • Support for Auracast and multi-point Bluetooth pairing with up to two devices.

What customers don't like about Harman Kardon Onyx Studio 9

  • No IP weatherproofing or water resistance, making it unsafe for beach or poolside use.
  • Lacks a charging cradle or dock, requiring users to manually insert an standard figure-8 cable.
  • No Wi-Fi connectivity or smart voice assistant integration.
  • Noticeable sound compression at maximum volumes, which impacts audio fidelity.
  • Slightly recessed mid-range frequencies out of the box before applying EQ adjustments.
  • Relatively heavy and bulky footprint, making it less travel-friendly than smaller portables.
  • Higher Bluetooth latency experienced by some Android users when watching video content.

Verdict

The Harman Kardon Onyx Studio 9 is a premium, portable 3-channel home speaker offering a 50W RMS output through a configuration of one 120mm woofer, three 20mm tweeters, and a passive radiator. Its main characteristics include an elegant circular design featuring a 90% recycled aluminum handle, Bluetooth 5.3 multi-device pairing, integrated Auracast for multi-speaker synchronization, and an automatic self-tuning room calibration feature. Its chief pros are its rich stereo playback, powerful deep bass, and convenient 7-band custom EQ adjustments available via the Harman Kardon ONE companion app. However, its primary cons include a somewhat mediocre battery performance that tops out at 8 hours of playtime, a strictly front-facing design that reduces sound quality at wider off-axis viewing angles, and a complete lack of an official IP water-resistance rating.

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