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Harman Kardon Onyx Studio 9 - Portable Stereo Bluetooth Home Speaker with Built-in Battery and USB Charging, self-Tuning, and Multi-Speaker Connection by Auracast - Black9.2Our score 4 photos
HKBrandHarman KardonHKHarman Kardon4 products in our catalogSee all Harman Kardon products →ID DBD-16183

Harman Kardon Onyx Studio 9 - Portable Stereo Bluetooth Home Speaker with Built-in Battery and USB Charging, self-Tuning, and Multi-Speaker Connection by Auracast - Black

9.2/10 our score 4.6 (542 ratings on Amazon)

Bluetooth music streaming: The Harman Kardon Onyx Studio 9 pairs seamlessly with up to two mobile devices simultaneously. Take turns sharing

Is WaterproofFalseBattery Average Life8 hoursFrequency Response20000 KHzSignal-to-Noise Ratio80 dbConnectivity TechnologyBluetooth, USBWireless TechnologyBluetooth

About this item

  • Bluetooth music streaming: The Harman Kardon Onyx Studio 9 pairs seamlessly with up to two mobile devices simultaneously. Take turns sharing playlists and music, all in enhanced, dynamic sound.
  • Built-in battery: With its rechargeable built-in battery, you can enjoy the Harman Kardon Onyx Studio 9 anywhere in your home, and easily transport it from one room to another for up to 8 hours of playtime
  • Self-Tuning: Enjoy perfect sounds wherever you take the music. When you power on, the Onyx Studio 9 automatically calibrates to its environment, ensuring the best sound possible no matter where you set it down.
  • Boost stereo sound with two speakers: Quickly and easily turn up the celebration with a wider, more detailed soundstage by pairing two Onyx Studio 9 speakers together, wirelessly.
Category: Audio › Portable Bluetooth SpeakersRanked #99 of 786 in Audio
9.2Our score
Our verdict

Bluetooth music streaming: The Harman Kardon Onyx Studio 9 pairs seamlessly with up to two mobile devices simultaneously. Take turns sharing

Ranked #99 in Audio · 4 things we like

Quick answer The Harman Kardon Onyx Studio 9 scores 9.2/10 with us. Amazon owners rate it 4.6 out of 5 across 542 reviews, above the 4.3 average of the 45 portable bluetooth speakers we track. It was listed at $194.95 on Amazon when we last checked in September 2026. Key facts: is waterproof False, battery average life 8 hours, frequency response 20000 KHz.

Elevate your everyday listening to an extraordinary sound experience with the Harman Kardon Onyx Studio 9. This elegant wireless Bluetooth® movable home speaker delivers superior audio performance with crystal-clear vocals, bright highs, and deep bass that make your favorite music feel thrillingly immersive. Constant Sound Field technology widens the soundstage and improves the clarity and detail of your music.

The substantial integrated handle (made with 90% recycled aluminum) and built-in battery with 8 hours of playtime make the Onyx Studio 9 easy to move with you in and around your home, and a built-in USB port recharges your device while you enjoy your music. And thanks to automatic self-tuning, it always delivers the best possible sound performance wherever you set it down.

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Product information

24 specifications
Audio Output ModeStereo
Mounting TypeFloor Standing
Enclosure MaterialMetal
Speaker TypePortable Speaker
Additional FeaturesBuilt-In Powerbank, Lightweight, Multi Room Audio, Portable, USB Port
Antenna LocationFor Smartphones or Tablets, For Computers, For Televisions
ColorBlack
Is WaterproofFalse
Warranty TypeLimited
Control MethodApp
Speaker Size13 centimeters
Specific Uses For ProductHome entertainment, Portable, Multi-room audio
Battery Average Life8 hours
Frequency Response20000 KHz
Number of Audio Channels3
Signal-to-Noise Ratio80 db
Connectivity TechnologyBluetooth, USB
Wireless TechnologyBluetooth
Connectivity ProtocolBluetooth, USB
Audio Driver TypeDynamic Driver
Audio Driver Size13 centimeters
BrandHarman Kardon
Model NumberHKOS9BLKAM
Model NameHK Onyx Studio 9

Pros & cons

What we like
  • Bluetooth music streaming: The Harman Kardon Onyx Studio 9 pairs seamlessly with up to two mobile devices simultaneously. Take turns sharing playlists and music, all in enhanced, dynamic sound.
  • Built-in battery: With its rechargeable built-in battery, you can enjoy the Harman Kardon Onyx Studio 9 anywhere in your home, and easily transport it from one room to another for up to 8 hours of playtime
  • Self-Tuning: Enjoy perfect sounds wherever you take the music. When you power on, the Onyx Studio 9 automatically calibrates to its environment, ensuring the best sound possible no matter where you set it down.
  • Boost stereo sound with two speakers: Quickly and easily turn up the celebration with a wider, more detailed soundstage by pairing two Onyx Studio 9 speakers together, wirelessly.
What could be better

    Harman Kardon Onyx Studio 9: questions & answers

    Is the Harman Kardon Onyx Studio 9 worth buying?

    Yes, it is one of the stronger picks in its group. We score the Harman Kardon Onyx Studio 9 9.2 out of 10. Amazon owners rate it 4.6 out of 5 across 542 reviews, above the 4.3 average of the 45 portable bluetooth speakers we track.

    How much does the Harman Kardon Onyx Studio 9 cost?

    It was listed at $194.95 on Amazon when we last checked in September 2026. That is more than the $89.98 median for portable bluetooth speakers in our catalog. Amazon prices change daily, so use the price button on this page to see the current figure.

    What are the key specs of the Harman Kardon Onyx Studio 9?

    Is Waterproof: False; Battery Average Life: 8 hours; Frequency Response: 20000 KHz; Signal-to-Noise Ratio: 80 db; Connectivity Technology: Bluetooth, USB; Wireless Technology: Bluetooth. All 24 specifications are in the product information table on this page.

    What are good alternatives to the Harman Kardon Onyx Studio 9?

    Similar, well-rated portable bluetooth speakers in our catalog: Bose SoundLink Flex Bluetooth Speaker (9.4/10, 4.7 stars from 13,002 owners); JBL Go 4 (9.2/10, 4.6 stars from 19,085 owners); MLOVE A200 Portable Retro Bluetooth Speaker (9.0/10, 4.5 stars from 146 owners).

    Bose SoundLink Flex Bluetooth SpeakerJBL Go 4MLOVE A200 Portable Retro Bluetooth Speaker

    Customer reviews

    All reviews on Amazon
    4.6542 global ratings
    5 star90%
    4 star10%
    3 star0%
    2 star0%
    1 star0%

    Breakdown from the 10 most helpful reviews we imported.

    H
    Hillary Garza
    Verified purchaseSeptember 3, 2026
    Sleek and High Performance

    Excellent quality and sound. Love it!

    W
    wsw
    Verified purchaseJuly 29, 2026
    My favorite Harman Kardon Onyx Speaker got better w Studio 9 model :)

    I have only had Harman Kardon Bluetooth Onyx speakers. They are beautiful and the sound is full and clear. I have given them as gifts, etc. This Studio 9 model works so much better than my old model as far as connecting goes. Love this - looks great on the shelf too

    I
    I Wayan Budiantara
    Verified purchaseAugust 2, 2026
    Best look best sound

    Great sound as I expected and the look is the best then the previous onyx simple and premium 🥰

    M
    Mary D.
    Verified purchaseAugust 17, 2026
    Love it!

    I only buy Harmon Kardon Bluetooth speakers! They sound amazing !

    A
    Adam F.
    Verified purchaseJuly 10, 2026
    Wow!!

    This thing sounds AMAZING! I only use it stationary so can't comment on battery. My only minor complaint would be that the bass needs a setting between 70 and 100 percent.

    R
    Reviewer
    Verified purchaseAugust 17, 2026
    Is it worth it?

    The sound is good, but honestly, I can’t really tell if it is any better than my Bose mini for my purposesTwo annoyances one I use it primarily with an audio cable and it loses it connection quite often and two the most annoying off button I’ve ever encountered. I know they have to make these things to be durable, but it usually takes a few presses to turn it off.

    P
    Pete Stangeland
    Verified purchaseAugust 6, 2026
    Sound

    Very nice speaker. I like treble. So I turned the treble up and perfect.

    K
    Kindle Customer
    Verified purchaseJuly 13, 2026
    GREAT SOUND, CONNECTS TO YOUR PHONE QUICK

    AMAZING SPEAKER FOR THE PRICE

    Customer reviews are shown as published on Amazon and are not written by Do Best Deal.