Harman Kardon Onyx Mini Portable Bluetooth Speaker Review

Harman Kardon Onyx Mini

Harman Kardon is known to produce great audio products, and today I’ll be reviewing one of their portable Bluetooth speaker, the Harman Kardon Onyx Mini.

Harman Kardon Onyx Mini Unboxing

Harman Kardon Onyx Mini 01

Inside the box are the following:

  • Harman Kardon Onyx Mini
  • Power Adapters
  • Charging Brick
  • USB Cable
  • Manual
  • Warranty Card

You can also check out my video unboxing below.

Design and Build Quality

At first glance, the speaker certainly looks elegant. It is small but I can’t actually call it portable since its design makes it a bit difficult to carry around. It does, however, have a premium feel to it. The back has a rubberized coating, and the buttons are pretty tactile to press.

I really like the design of this speaker but it suggest that it is intended to use indoors. You can use it outside your house, but would not probably bring it during a hike or any outdoor activities.

Sound Quality

The audio performance of this speaker is superb. The bass at the back gives out such great deep lows. It also has great sounding mids and decent highs. It is not as loud as other high end Bluetooth speakers but it is loud enough for its size.

The speakerphone is also good, eliminating echoes as you talk. But as you increase the distance between you and the speaker, the sound quality of the call tends to decline.


Harman Kardon Onyx Mini 06

Its connectivity is great. It can pair with my phone instantly and has a bit of range. The speaker can still connect with my phone and play music with a good distance on an open space. But it does tend to stutter when I tried playing music from another room because there is a wall blocking the signal.

It can also be connected physically via a 3.5mm audio port. But there is no 3.5mm audio cable included in the package, so you need to buy one yourself.

Battery Life

The Onyx Mini can play music up to 10 hours straight. I brought it with me during a photo shoot that lasted all day and it performed admirably. I only charged it once over the 12 hour shoot. And the charging time is fast as well.

Other Features

The Onyx Mini also feature a Wireless Dual Sound. Which means it can be linked with another Onyx mini if you’d like, similar to the JBL Connect. As of this writing, I’m told that it can also be paired with other speakers that has the Wireless Dual Sound feature such as the Harman Kardon Onyx studio 3 and Go+ Play. The two speakers paired together, however, doesn’t deliver a left and right sound orientation for surround sound. It is claimed that it has a bit of a water resistance, but I didn’t take the risk to test it out.


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