Harman Kardon Onyx Studio 4 Refurbished


Portable Bluetooth Speaker

$314.99314.99 each $449.95 Save $135
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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
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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.

Call us: 1.800.336.4525

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Harman Kardon Onyx Studio 4 is rated 4.1 out of 5 by 220.
Rated 5 out of 5 by from Room filling sound Received this as a gift, very impressed with the sound quality, it fills the room with a rich smooth sound
Date published: 2019-06-14
Rated 5 out of 5 by from Awesome sound! The sound produced by this speaker is fantastic. I'm really pleased with myI purchase. My only gripe is that I purchased this speaker in a white finish and it was supplied with a black power pack and lead. Not great!
Date published: 2019-06-11
Rated 5 out of 5 by from Geat price/value ratio I ordered one for trial, one day later I received it and tried to connect with a second one from a friend. Excelent amazing sound, easy connectivity, so immeniatly I ordered a second one.
Date published: 2019-06-03
Date published: 2019-05-28
Rated 5 out of 5 by from Love My Onyx 4 Studio This is my three one. I purchased one for me and my grandson a few years ago. I damaged mine this past September by dropping it. Just purchased a new a few weeks ago and I’m treating it like a newborn baby!
Date published: 2019-05-15
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what is the satellite speaker and the subwoofer of this speaker?

Asked by: Alesya12
Hi there, we’re here to help. Onyx Studio 4 is a single unit portable speaker, which operates on its own. It’s designed with a 2 x 75mm woofer and a 2 x 20mm tweeter. Satellite speakers refer to a speaker in a home theater system that’s placed behind or on the side to produce surround sound. Subwoofers on the other hand, are low frequency speakers which are responsible for producing the bass. For more information check out this link: https://www.harmankardon.com/bluetooth-speakers/HKOS4BLKAM.html
Answered by: Rhae C
Date published: 2019-08-18

No sound comes from the speaker. I tried connecting via bluetooth but no sound came. I tried again through an aux cable and it did not work.

Asked by: vp11
Hi there, please try to reset the speaker by pressing and holding the phone button and the volume + at the same time for 5 seconds. If that doesn't work, please contact us at the link below. http://www.harmanhouse.com/index.php?route=information/contact
Answered by: Mario at Customer Service
Date published: 2019-08-18

Hi - I live in an apartment building and I think my neighbors are pairing with this speaker. How can I stop that? Or at the very least, unpair them? I don't want anyone else to be able to use this except me, but the Bluetooth signal goes beyond my studio.

Asked by: Josh Taco
Thanks for the review. Resetting you Onyx Studio 4 would delete all it's previously connected devices, including your neighbors' phone. Here are the steps: Press and hold the Phone and VOL + button simultaneously. After 5 seconds, the unit powers Off and is now reset. Let us know if you have other questions using this link: https://support.jbl.com/us/en/customer-service/contact.html 
Answered by: Rhae C
Date published: 2019-08-12

Can i pr this speaker too an Alexa unit?

Asked by: 1DnD
Hi there, you can pair your Alexa unit to our Harman Kardon Onyx studio 4 by pressing and holding the Bluetooth button until the lights flash blue to put it in pairing mode, then go to your device and look for Onyx studio 4 and tap on it to connect to it. If you need more help, please submit a case request so we can assist you: https://www.harmankardon.com/support-contact.html
Answered by: Mario at Customer Service
Date published: 2019-08-08

Can you connect a microphone to it? Blue tooth?

Asked by: Katherin
That's an interesting question, Katherine. Your mobile devices, tablets, or laptops are the sources that can only be connected to the speaker via Bluetooth or through auxiliary but not an external microphone.
Answered by: Kris A
Date published: 2019-08-02

Why does my speaker sound distorted

Asked by: Kristy
Hi Kristy, thanks for posting this question. We may need to troubleshoot your Harman kardon Onyx Studio 4 speaker to find out why it sounds distorted. If you haven't yet, please submit a case request to the link below so we can continue to help you: https://www.harmankardon.com/support-contact.html
Answered by: Zoe at Customer Service
Date published: 2019-07-20

Can't seem to connect with my android phone

Asked by: Robyn
Let's try to troubleshoot your Harman Kardon Onyx Studio 4. We suggest pairing the speaker to your phone by pressing on the Bluetooth button on the speaker — once you see the light blink fast, turn on the Bluetooth on your phone and let it discover the speaker and connect to it. If you are still unable to discover the speaker by doing this, you can reset it by pressing and holding the Volume + and Phone buttons simultaneously for about 5 seconds while the speaker is on. The speaker will then power off, letting you know that it is reset back to its factory default settings. When you turn the speaker on after doing a reset, it should automatically go into pairing mode. Follow the steps above once you see the light blinking to try and pair your phone again. If you continue to experience any issues, let us know and we'll take the next steps: https://www.harmankardon.com/support-contact.html
Answered by: Zoe at Customer Service
Date published: 2019-07-19

Can I connect 2 Onyx Studio 3 with 2 or more Onyx Studio 4?

Asked by: Alexander Munoz
You cannot even connect four Studio 4s together at the best of times ESSPECIALLY WITH THEIR FAULTY HK CONNECT APP! Better off saving yourself alot of heartache and throw this rubbish in the trash where it belongs!
Answered by: Pollyfodder
Date published: 2019-07-02
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