Name: Harman Kardon Onyx Studio 9 Black
Brand: Harman Kardon
SKU: 957570
Price: 229.99 EUR
Availability: InStock
Rating: 9.1 (6 reviews)

Go to main content

Delivered, when it suits you

Business Stores About Coolblue

Customer service

0211 819 735 55

Product information
Similar and better products
Recommended combination
Reviews
Insurance
Accessories
Specifications

Product information

Key specs

	Weight	4,2 kg
	Wireless speaker size	Large (25 - 40cm)
	Built-in WiFi
	Controls via app
	Water-resistant

Show all specifications

Pros and cons

According to our Bluetooth speaker expert

The Constant Sound Field technology provides a wide sound range, so you can hear many details in the music.
Because the speaker adjusts the sound to every room, you can listen to full and detailed sound in every room.
With the 8-hour battery life, you can listen to music the entire afternoon without problems.
The speaker isn't dust-resistant and water-resistant, so you can't place it outside.

Description

With the Harman Kardon Onyx Studio 9 Black, the music sounds like you're there to hear it live. The speaker has a 3-channel system with the Constant Sound Field technology. Thanks to this, it distributes the sound over 3 channels and wide into the room. This allows you to hear many details in the music. The speaker automatically adjusts the sound to every space. Thanks to this, you can listen to full and detailed sound. With the 8-hour battery life, you can listen to music for an entire afternoon. Thanks to the built-in power bank, you can charge your smartphone with the speaker. This way, you're not often without music. You can connect to multiple speakers via Auracast, so you can hear more powerful sound.

Tips for using this product

Included by default

Charger

Similar and better products

- Current product
  Harman Kardon Onyx Studio 9 Black
- Harman Kardon Onyx Studio 9 Gray
- Harman Kardon Aura Studio 4
- Retail price
  € 249,99
  € 229,99
- Retail price
  € 249,99
  € 229,99
- Retail price
  € 329,99
  € 272,90

- Stereo
- Stereo
- 360 degrees

Show full comparison

Reviews

Rating

5 stars

4 stars

3 stars

2 stars

1 star

Most helpful reviews

Review is 8,3 out of 10.

Good product.

Beautiful Design
Good sound

For the sound, you do need to update the product in the app, which makes a difference. To achieve a wider stereo image, I bought two. Because I found the bass sounding a bit muddy, I turned it down a bit in the app. Afterward, the speakers sounded much tighter.

Review by:
Ron.
Date:
17 February 2026
Translation:
Automatically translated from Dutch

Review is 9,3 out of 10.

Great for that price

Design
Sound
User-friendliness

Beautiful design and was surprised by the sound. The second one is going on order. Two side by side (you can easily pair them) and connected to the TV via Bluetooth. (Put a 2.4g adapter in between and the sound is milliseconds slower than the TV). Add some popcorn and enjoy.

Review by:
Bert postema
Date:
20 May 2026
Translation:
Automatically translated from Dutch

Insure your Bluetooth speaker

Coolblue takes care of everything, from taking out an insurance to repairs
For almost all accidents
More coverage in case of damage than your standard warranty
No deductible

How do I insure my Bluetooth speaker?

First, add your Bluetooth speaker to your shopping cart. On the next page, choose the Protection Plan below. You always have a 30-day return window and pay no deductible in case of damage.

2-year Protection Plan
€ 8,99
one-time
3-year Protection Plan
€ 15,99
one-time

Specifications

Product

Product
	Product number	957570
	Manufacturer code	HKOS9BLKEP
	Brand	Harman Kardon
	Warranty	2 years
	Processing of your defect	Via Coolblue

Physical properties

Physical properties
	Speaker type	Bluetooth speaker
	Width	28,9 cm
	Depth	13 cm
	Height	28,7 cm
	Wireless speaker size	Large (25 - 40cm)
	Weight	4,2 kg
	Color	Black
	Integrated light effects
	Built-in microphone

Power supply

Power supply
	Integrated power bank
	Average battery life	8 hours

Network and streaming

Network and streaming
	Bluetooth
	Built-in WiFi
	NFC
	Multi-room audio
	Plays from network
	Radio
	Headphone jack
	Sound reproduction	Stereo

Controls

Controls
	Controls via app
	Controlled via buttons on device
	Remote control

This is the one

Harman Kardon Onyx Studio 9 Black

Review is 9,1 out of 10, based on 6 reviews.

anything for a smile

Delivered, when it suits you

Harman Kardon Onyx Studio 9 Black

Choose your Bluetooth speaker