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
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Harman Kardon Onyx Studio 4 is rated 4.2 out of 5 by 116.
Rated 5 out of 5 by from Tremendous sound!!! The best sound quality from all bluetooth portable speakers that I ever heard. The battery is too small for this speaker.
Date published: 2018-06-22
Rated 5 out of 5 by from This rocks! I bought one and then I bought another! Amazing sound, sleek looks...WOW!! I love these!! HK did it right!!
Date published: 2018-06-14
Rated 5 out of 5 by from I love this Bluetooth speaker! I just purchased one yesterday from Sprint, and I have to say that I'm very surprised by the clear sound & excellent bass that this speaker puts out. It's the best Bluetooth speaker that I've come across. It's portable with a handle too, so that you can take it to the beach with you after a full charge. Superb listening experience!
Date published: 2018-06-04
Rated 5 out of 5 by from best speaker i thought it wasnt worth the money to buy this speaker but i love it its the best out there highly recommend. love the sound and the quality that comes out. used it at a pool party which was a little loud but you could still hear the music through the talking and splashing.
Date published: 2018-05-30
Rated 5 out of 5 by from Super loud and DEEP BASS The speaker can get extremely loud. Like really loud. The bass is very clean yet deep, and it keeps up with the rest of the audio, it does not overdo the highs or mids. Utter beauty
Date published: 2018-04-24
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Can you sync and play both speakers at once from the same audio device ie iPhone?

Asked by: Gary Bush
Yes you can. The HK connect+ feature of the Onyx studio 4 allows you to play multiple Onyx studio 4 from a single source, you can connect 100+ devices with the Hk Connect +.
Answered by: Mario at Customer Service
Date published: 2018-07-16

What are the differences between Onyx Studio 1, 2, 3, and 4?

Asked by: bribarrett_
In a nutshell, the sound gets better and better, with the Onyx studio 3 has the Wireless Dual Sound, which allows you to connect to 1 other Onyx Studio 3. While the Onyx studio 4 has the HK Connect+ which allows you to connect to multiple Onyx studio 4's at the same time playing the same music.
Answered by: Mario at Customer Service
Date published: 2018-07-16

I have read that the Firmware needs to be updated.... yet I can't find out how to do that. Can you explain how to update to the latest firmware?

Asked by: Alice56
You will need to get the HK Connect app on your phone in order to update the firmware of the HK Onyx studio 4. If there is no update available then that means that it's already in it's latest version.
Answered by: Mario at Customer Service
Date published: 2018-07-16

Is there a way to adjust the bass? It's too much for my liking.

Asked by: stephie
Hi.Unfortunately, you cannot adjust the bass and treble with the Onyx Studio 4.
Answered by: Mario at Customer Service
Date published: 2018-07-15

I am not able to connect via bluetooth for HP on windows 10, Speaker bluetooth is not at all showing name in bluetooth list, but it is working perfect for other mobile devices

Asked by: Chinthan
There are a variety of factors for us to consider such as the model of your HP computer and the different Bluetooth drivers that may be on your computer. We may also need to do a reset on your Onyx Studio 4 to see if that would make a difference. To do this: While the unit is turned on, press and hold both the Phone and the Vol+ buttons for at least 5 seconds. If successful, your unit should turn off, indicating that the reset was successful. Pleas try pairing it again with your computer after this. If the speaker would still not pair with your computer, we would like to work with you directly. We noticed you're from the United Arab Emirates. Please submit a case request at http://www.harmanhouse.com/index.php?route=information/contact and the Customer Service Team will be more than happy to assist you.
Answered by: Steve S
Date published: 2018-07-15

How harman kardon onyx studio 4 deliveries 60w(AC MODE) if the power supply can delivery just 40W( Power supply: 19V/2A)? Does it uses the battery and the power supply power to delieveries 60W? If so it uncharges when it delieveries the maximum power?

Asked by: AlucardMa
Hi! The Onyx Studio 4 can deliver 4 x 15W while in AC mode and 4 x 7.5W in Battery mode. This is because while it is plugged into an outlet, the speaker uses electricity directly and by passing the battery for it to charge. On the other hand, if it is unplugged/ in battery mode, it has half the power because it uses up the power from the battery itself.
Answered by: Nick F
Date published: 2018-07-13

Hi I purchase onyx studio 4 about 2 months ago and it’s really not performing the way it was in the store I’m sure something wrong with mines my niece has one as well we purchased the same day her’s play louder clear nice mines has a problem

Asked by: Black
Hello! We would like to work with you directly to help you with your issue. 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: Nick F
Date published: 2018-07-11

Can i continuosly plug in the charger while in use for long time?

Asked by: Mardi
Yes, it is completely safe to leave the Onyx Studio 4 connected to the power whether it is in use or not. Take note that using the Onyx Studio 4 while plugged in will prolong the charging time.
Answered by: Steve S
Date published: 2018-07-08
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