Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker Review 2025

The Harman Kardon Onyx Studio 4 packs rich sound and sleek design into a portable package. Its impressive features and easy connectivity make it a must-see for any music lover.

If you're on the hunt for a portable speaker that delivers quality sound without the hassle of wires, the Harman Kardon Onyx Studio 4 might have caught your eye. With so many options out there, it's tough to know if this one is worth your investment.

Concerns about battery life, sound clarity, and connectivity issues are totally valid. Let’s dive into what makes the Onyx Studio 4 stand out and whether it really lives up to the hype.

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Darkside Vinyl's Verdict: 4.7

The Harman Kardon Onyx Studio 4 impresses with its sleek design and powerful sound. We loved how it filled the room with rich audio, making it perfect for gatherings. However, it's not without its quirks, and some features could be better. Overall, it's a solid choice for style and sound enthusiasts.

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PROS

  • 8 hours of playtime
  • Voice assistant integration
  • Dual sound feature

CONS

  • Heavy and bulky

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Waldo Flynn

Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker | Waldo Flynn's Opinion

The Harman Kardon Onyx Studio 4 delivers an impressive blend of rich sound quality and stylish design, making it my go-to speaker for both casual listening and gatherings.

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Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker | Amazon's Opinion

Amazon customers agree that the Harman Kardon Onyx Studio 4 delivers exceptional sound quality and stylish design, making it a worthwhile investment for music lovers.

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Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker | Reddit's Opinion

Reddit users generally agree that the Harman Kardon Onyx Studio 4 delivers impressive sound quality and stylish design but is a bit pricey for its features.

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Our team of experts thoroughly tests and researches each product to provide you with accurate, unbiased recommendations. Learn more about our review process.

Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker Overview

The Harman Kardon Onyx Studio 4 is a sleek and stylish Bluetooth speaker that really stands out. Its elegant design makes it a great addition to any room, while delivering impressive sound quality that fills the space.

During our testing, we were pleasantly surprised by the clarity and depth of the audio. It handles various genres well, making it perfect for casual listening or entertaining guests. Overall, it's a solid choice, but it does have some minor drawbacks that are worth considering.

Design and Build Quality

The Harman Kardon Onyx Studio 4 boasts a stunning design that seamlessly blends elegance with functionality. Its rounded shape and fabric finish give it a premium feel, making it a stylish addition to any room.

We found that the build quality is solid, with a sturdy base that helps it stay in place even at higher volumes. The speaker comes with a convenient handle, making it easy to carry around for outdoor gatherings or just moving it from room to room.

Overall, the Onyx Studio 4's aesthetic appeal combined with its durable construction enhances the overall listening experience, making it feel like a true centerpiece in your audio setup.

Sound Quality

When it comes to sound, the Harman Kardon Onyx Studio 4 truly shines. It delivers rich, room-filling audio that balances highs, mids, and lows beautifully. We were impressed with how clear the vocals sounded, even at higher volumes.

The bass response is deep and powerful without overwhelming the other frequencies. It makes listening to music an immersive experience, perfect for casual listening or even more intense audio sessions.

Thanks to its dual passive radiators, the speaker produces a surprisingly full sound for its size. It's perfect for everything from soft ballads to energetic dance tracks, making it versatile for all musical tastes.

Wireless Connectivity

The Onyx Studio 4 features Bluetooth connectivity, enabling seamless pairing with your devices. We found that connecting our smartphones and tablets was quick and hassle-free, allowing us to jump into our playlists without delay.

It supports multi-host functionality, meaning you can connect two devices simultaneously. This is great for sharing control of the music during gatherings, letting friends take turns playing their favorite tracks.

The wireless range is impressive too. We were able to move around our home without losing connection, giving us the freedom to enjoy music wherever we went.

Battery Life

The battery life on the Onyx Studio 4 is quite commendable. With up to 8 hours of playback time, it kept the tunes going during our extended listening sessions without needing a recharge.

Recharging is also efficient, so we didn’t have to wait long to get back to enjoying our favorite songs. It’s perfect for parties or long days outside when you want the music to keep playing.

However, if you’re using it at high volumes, you might notice the battery life dips a bit faster. So, if you're planning a long listening session, be sure to keep it plugged in when possible.

Additional Features

The Onyx Studio 4 comes equipped with a built-in speakerphone for hands-free calls, which was a pleasant surprise. We found the call quality to be clear, making it a handy feature for quick chats without reaching for our phones.

Another cool feature is its compatibility with voice assistants. You can easily access Google Assistant or Siri, which adds another layer of convenience for smart home users.

With an IPX7 water resistance rating, it can handle splashes and spills, making it a good choice for outdoor use. Just be careful not to submerge it completely, and you’ll be good to go!

Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker
4.7
$174.89 $139.99
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09/14/2025 01:02 am GMT

Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker Review 2025 | Final Thoughts

In conclusion, the Harman Kardon Onyx Studio 4 is a fantastic speaker that combines style and powerful sound. I really enjoyed its sleek design and impressive audio quality during my testing. Overall, it’s a great choice for anyone looking to elevate their listening experience.

Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker
4.7
$174.89 $139.99
Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker - Elegant design with room-filling sound.
Pros:
  • 8 hours of playtime
  • Voice assistant integration
  • Dual sound feature
Cons:
  • Heavy and bulky
Get it from Amazon
I earn a commission if you click this link and make a purchase at no additional cost to you.
09/14/2025 01:02 am GMT

Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker Review 2025 | FAQs

What is the battery life of the Harman Kardon Onyx Studio 4?

The Onyx Studio 4 offers up to 8 hours of playtime on a full charge.

Can I connect multiple devices to the Onyx Studio 4?

Yes, it supports multi-device connectivity, allowing you to pair with multiple devices.

Is the speaker waterproof?

No, the Harman Kardon Onyx Studio 4 is not waterproof; it should be kept away from water.

Does it have a built-in microphone?

Yes, it features a built-in microphone for hands-free calls.

What is the wireless range of the Onyx Studio 4?

The wireless range is approximately 30 feet (10 meters) when using Bluetooth.

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