Harman Kardon Onyx Studio 4


Portable Bluetooth Speaker

£199.99199.99 each
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Elegant design full of features and superior sound

Providing the perfect balance of great sound, iconic design, and premium materials, the Onyx Studio 4 is the epitome of room-filling audio. Crafted to be the best sounding, full featured, portable Bluetooth speaker in its class, the Onyx Studio 4 offers two device connections, 8 hours of playtime and Harman Kardon Connect+, which allows you to connect 100+ speakers with the same feature with the touch of a button. Rounding out the Onyx Studio 4 offerings is a built-in microphone with Voicelogic, echo and noise cancellation for crystal-clear conferencing over the speaker.


General Specifications

Support A2DP 1.3, AVRCP 1.6, HFP 1.6
Transducers Woofer 2 x 75mm, Tweeter 2 x 20mm
Rated Power 4 x 15W (AC mode); 4 x 7.5W (Battery mode)
Frequency response 50Hz - 20kHz (-6dB)
Signal to noise ratio 80dB A-weighted
Weight: 2061g Yes


Dimension (H x W x D): 260mm x 278mm x 159.5mm Yes

Control and Connection Specifications

Bluetooth version: 4.2 Yes
Bluetooth transmitter power 0 - 9dBm
Bluetooth transmitter frequency range 2402MHz - 2480MHz
Bluetooth transmitter modulation GFSK, π/4 DQPSK, 8DPSK


Power supply 19V/2A
Battery type 3.7V/3000mAh Lithium-ion
Battery charge time 5 hours
Music playtime up to 8 hours (Varies by volume level and music content)
Click here for a complete list of all specs for this product

Spec Sheet (EN)

709 KB
  • 1 x Harman Kardon Onyx Studio 4
  • 1 x Power adaptor
  • 1 x Quick start guide
  • 1 x Safety sheet
  • 1 x Warranty card
Harman Kardon Onyx Studio 4 is rated 4.3 out of 5 by 75.
Rated 5 out of 5 by from Sonic marvel Just got my Onyx 4. This unit defies the laws of Physics. Amazing bass coming out of it, to the point that I'm asking for less. Anyway, great unit at a league of its own. I mainly listen to jazz. I guess electronic (bass-heavy) music lovers will adore it.
Date published: 2018-02-15
Rated 5 out of 5 by from Great Bluetooth speaker This is by far the best Bluetooth speaker that I have listened to.
Date published: 2018-02-10
Rated 5 out of 5 by from Onyx studo 4 What drew my attention to the Onyx Studio speaker system I stopped by a friends and his Onyx 3 was filling the Air with all this beautiful sound I knew I had to have one so I purchased the HK Onyx studo 4, In Love
Date published: 2018-02-06
Rated 5 out of 5 by from Great speaker Sound is great! After testing a lot of other models I can tell, best sound quality for its category. Two improvements needed, add micro usb or even better usb-c to charge with any charger. And secondly, improve integration with iOS devices to display remaining battery percentage.
Date published: 2018-01-19
Rated 5 out of 5 by from Great mid-range bt speaker! In Europe is priced at 200 euros and it's hard to find anything better in that price range. Balancing it with some eq is a must, otherwise bass is way too overwhelming, mids are recessed and highs are not well pronounced... But when you play with it for a few days, man it shines! Nice sound stage, punchy bass, good mids, solid highs and even some stereo separation... Planing to buy another one these days. That should be impressive!
Date published: 2018-01-16
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How to connect Hartman speaker from apple phone?

Asked by: JCMystee
To pair your Harman/Kardon Onyx studio 4 to your Apple phone, first turn on the Onyx studio 4 and press and hold the bluetooth button until it flashes so it will go to pairing mode. Next would be to go to your phone's bluetooth settings in order to connect to it. If you're still having issues with pairing, please submit a case request at https://www.harmankardon.com/support-contact.html and the Customer Service Team will be more than happy to assist you.
Answered by: Mario at Customer Service
Date published: 2018-02-16

Hi I have onyx studio 4 , I need to know that will there be led indication when the charging is full ? I do not want to leave charging on all the time.

Asked by: Phill
Hi , the LED indicator for the speaker charging is a blinking white on the power button and would blink red when it's low on battery and does not have any indicators when fully charged. No need to worry keeping it charged since this will not ruin the battery life of the speakers. The Speakers will be powered through the outlet(AC mode) and would still work fine.
Answered by: Mario at Customer Service
Date published: 2018-02-17

I wondered if onyx 4 is water resistant and approved for use in bathrooms

Asked by: Guest5
The Onyx Studio 4 is not waterproof so you cannot splash it with water as it may damage the speaker.
Answered by: Mario at Customer Service
Date published: 2018-02-17

what is the difference between Harman Kardon Onyx Studio 4 and Harman Kardon Onyx Studio 3? Does Harman Kardon Onyx Studio 4 has 3.5 mm Aux input also ?

Asked by: Guest
Aesthetically speaking, they both look the same. In terms of performance, the main difference is the music playing time for each speaker - the Onyx Studio 3 has an audio playback of up to 5 hours and the Onyx Studio 4 has up to 8 hours (varies by volume level and music content). Another one of their main differences is the speaker connectivity: the Onyx Studio 3 offers the Wireless Dual Sound feature which allows you to connect a maximum of (2) speakers with the same feature for amplified sound whereas the Onyx Studio 4 has the HK Connect+ feature that allows you to connect to as much as up to 100 speakers with the same feature. The Onyx Studio 3 cannot be connected to an Onyx Studio 4. The Onyx Studio 4 does have an Aux Input.
Answered by: Steve S
Date published: 2018-02-17

HK Onyx Studio 4. I'm using it with my Windows 10 machine. My PC often disconnects it and often when I reboot my PC it doesn't see the speaker until I have to go through the bluetooth steps. Can I hardwire it with a USB cable. Service port ?

Asked by: JayP
No, the Onyx Studio 4 cannot be connected to a Windows 10 device through the service port and use that connection to play media files from the device to the speaker. You can use an aux cable to connect it to a 3.5mm port on your device instead.
Answered by: Steve S
Date published: 2018-02-17

Great speaker, but HK Connect+ app is not even beta quality. Stereo mode drops all the time, if app manages to find two speakers. Is the app in active development and can we expect that these serious usability issues gets sorted out at some point?

Asked by: sapesa
The same problem continues. I have not been contacted as promised. When will the faulty apps and/or firmware be fixed?
Answered by: Juha L
Date published: 2018-02-07

Hi Imhaving trouble connecting to our HK onyx speaker (S/N: FC0005-0997787) with my iPhoneX

Asked by: Sigrid
Hi Sigrid Thank you for the question. you should go to the bluetooth list in you iPhone and press the pairing to your HK Onyx speaker, then it should connect. If it will not connect then old pairing information in the iPhone is removed and the speaker is set into pairing mode - then it should reappear as an available device on you phone and a new pairing is made. if all of this fails, please do not hesitate to contact our help-desk who will gladly assist you further.
Answered by: Mogens
Date published: 2018-01-31

Hello! I "happend" to connect to my neighbuor's device. Have also heard of friends who got a chock when their devices suddenly begins to pplay because someone else connected to their Onyx. Is there anything you can do to lock "connection mode" Regards U

Asked by: Ullis
We would like to work with you regarding your issue. I noticed that you are in Sweden. If you are still having issues, please submit a case at https://www.jbl.se/support-contact.html#ns and our Customer Service Team will be glad to assist you.
Answered by: Steve S
Date published: 2018-02-02
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