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If you’re searching for pure, high quality audio, the best speakers around just might be the Harman Kardon Onyx Studio 4 Speaker. It’s so common for speakers to utilize bass to the point it drowns the rest of the notes rather than compliment them. The Harman Kardon Onyx Studio 4 Speaker is not that kind of speaker. Its incredibly deep bass highlights the audio instead of overpowering.

Why We Like It – Harman Kardon Onyx Studio 4 Speaker Review

With audiophiles in mind, this speaking is boasting some of the best sounding audio. Though bass is emphasised, it never overpowers mid-range and high notes, and compliments them perfectly.

  • Excellent overall sound quality
  • Perfect for medium-sized rooms
  • Supports voice assistants
  • So-so battery life
  • Not much of a portable speaker


The Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker produced some of the best sound quality, challenging even the best on our list for supremacy. The speaker wasn’t content with providing exquisty deep sounding bass—better than the JBL Charge 3 Speaker—but mid-range and high notes were almost just as good. What made a difference with this bass-focused speaker was that it never overpowered higher notes. Unfortunately, you only have 8 hours to enjoy its excellent sound quality.

Additionally, the speaker has a built-in mic, with compatibility with Siri and Google by utilizing the power button. You can change that through the HK Connect app, thankfully. For Amazon integration, look to the Amazon Echo Dot Speaker.


To consider this as a “portable Bluetooth speaker” wouldn’t be entirely accurate. The Harman Kardon Onyx Studio 4 Speaker is less of a social bug compared to other portable Bluetooth speakers such as the Oontz Angle 3 Speaker. Because of how large it is—about the size of someone’s head—it’s better left on your shelf in a medium-sized room. However, it weighs just under 5 lbs and has a handle, so if you want to take it to a friend’s house, you totally can.


These speakers have such great sound, with all kinds of smart home integration, that we can’t help but mark it as having great value. It’s so versatile with its features that you can fit it to just about any style of room. Want to compliment your home theater system? Place one on each side of your couch for surround sound. Looking to jam out with some good tunes or use it as a smart home speaker? Yes and yes. But if price is a concern, and you still want a smart speaker, check out the Amazon Echo Dot.

Harman Kardon Onyx Studio 4 Speaker Review Wrap Up

The negative aspects of the Harman Kardon Onyx Studio 4 Speaker were quickly swept under the rug just because of how great the audio was. It’s better left in a medium-sized room anyways, making its so-so battery life a moot point. And quickly accessing smart home functions was the cherry on top.

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Brady Meyers

Brady Klinger-Meyers is a writer based in Pennsylvania. He regularly contributes to websites such as Hardcore Droid, Gamepur, and Homebli. His work remains primarily in technology, from video game journalism to consumer technology.

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