Harman Kardon Onyx Studio 4


Portable Bluetooth Speaker

$139.99139.99 each $449.95 Save $310

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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)

English 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

1 Year

Products purchased online or from an authorized local retailer and under warranty may qualify for an exchange with a valid receipt.

Purchases made from an unauthorized dealer will not be eligible for exchange.

Harman Kardon does not service warranty claims for 3rd party products sold on the site.
You will need to need to reach out the manufacturer directly.

Call us: 1.800.422.8027

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  • Technical help
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Harman Kardon Onyx Studio 4 is rated 4.1 out of 5 by 133.
Rated 5 out of 5 by from Great sound I buy this one in onlineshop and the quality of the sound is so great and clearly to hear..
Date published: 2018-11-09
Rated 5 out of 5 by from AWESOME QUALITY OF SOUND! I bought two speakers & the sync up feature is just beautiful. LOUD for their size. So far, great value! This is one awesome product & a must have for the true music lovers
Date published: 2018-10-19
Rated 5 out of 5 by from Best in it’s class, with Superior Sound! I bought my Onyx 4 a couple months ago along when I got my iPhone X, work, home, heck I even put it in my backpack when I go out jogging or taking my Rottweiler on her walk! This speaker sounds awesome in any environment! I couldn’t be any happier with a portable blue tooth speaker! Thank you HK for making such an awesome product!
Date published: 2018-10-15
Rated 5 out of 5 by from Quailty assured the best Bluetooth speaker i have ever come across..the Quailty is the best in the market. put it to the test..
Date published: 2018-09-25
Rated 5 out of 5 by from Best bluetooth speaker in its class This speaker had destroyed all other speaker in its price range at 445 dollars. It even beats some of the speakers that are more expensive. The OS 4 sometimes even go as cheap as 150 dollars. If sound quality is on the top of your list and portability and extra features aren't so important to you, this is the speaker you want to get.
Date published: 2018-09-11
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What's the difference between OS2, OS3 and OS4? It's only battery capacity? Have the difference in volume? Many thanks!

Asked by: Oleksandr
From Onyx studio 2 to the New Onyx studio 5. OS2 =Nice , OS3= Good , OS4= Better , OS5 = Best. All in terms of sound quality.
Answered by: Mario at Customer Service
Date published: 2018-11-18

after paring two Onyx 4 together does the Onyx studio 4 auto pair it self even after a power off and on or do you have to manually pair both speaker or speakers after every power cycle? also can the Onyx studio 5 auto pair itself to another speaker?

Asked by: Dametrix
Hi, and thank you for your interest! None of our portable speakers will pair by themselves. You must establish the connection each time the speakers have been turned off, then re-activated. Sorry about that, but this cannot be changed.
Answered by: Bo HARMAN
Date published: 2018-11-13

Can I keep it plugged in to electrical source all the time or must I disconnect it when fully charged & use the battery power up before plugging again? I don't plan to move the speaker around, and it would be easier if it is okay to let remain plugged in

Asked by: KenW
An average Lithium-ion battery would survive around 500~1,500 charging cycles. Now, according to techs out there who've tested it, it is not ideal to use it from 100-0 in one go, this would degrade the battery's life span badly. There is no harm in keeping the speaker plugged in, what is harmful, is heat. Keeping it plugged in while using it might cause the battery to heat up to such degree that it would also degrade your battery. With these things in mind, what we can advise is - it is okay to leave it plugged in, the charger and the batteries right now are smarter than we think, there is no such thing now as "overcharging". But since heat is something we would like to avoid, unplug it when you use it and charge the speaker a little every time you have a chance to. Lithium-ions takes charge better when done on small frequent charges than going from 0-100. And last note, NEVER flat your battery out.
Answered by: Mario at Customer Service
Date published: 2018-11-12

Is there a place to repair this speaker as mine got wet and I think one of the tweeters blew.  

Asked by: Gregm53
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: Mario at Customer Service
Date published: 2018-11-10

What does ‘Refurbished’ mean, will this have any affect on the quality of the produc or sound and do you still get a warranty with the purchase. I am interested in the onyx studio 4

Asked by: Oakesy
Hi. I can see that we do not show the usual explanation for outlet or refurbished products on the HK web shop, but I found it on the JBL shop. Here is our official explanation for refurbished, recertified or outlet products: "Love a bargain? You’ve come to the right place. Shop our recertified products here. This means they’ve been returned and quality checked. We’re so sure they’re perfect, you’ll get the same two-year warranty. Happy shopping!"
Answered by: Bo HARMAN
Date published: 2018-11-07

Also do my Onyx 4s automatically turn off? And how long? They seem to stay on..

Asked by: matt79st
The Harman Kardon's Onyx studio 4 shuts off after 5-10 minutes without any sounds coming out of it or if left idle.
Answered by: Mario at Customer Service
Date published: 2018-11-02

I have 2 onyx 4s how do they automatically stay in stereo each time I turn on my phones bluetooth tooth. My minis would auto connect when turned on

Asked by: matt79st
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: Mario at Customer Service
Date published: 2018-11-02

Good day. Does the Studio 4 have Aux input?

Asked by: JeanLambrechts
Yes they do. The Onyx studio 4 has an Aux input in case the source device is not capable of connecting to it via Bluetooth.
Answered by: Mario at Customer Service
Date published: 2018-11-02
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