Customer reviews from harmankardon.nl
Harman Kardon - Onyx Studio 8 Speaker, Black
Average customer rating
4.6
(186 Reviews)
Rating breakdown 186 reviews
5 Stars
145
4 Stars
19
3 Stars
10
2 Stars
6
1 Star
6
95%of customers recommend this product.
(
92 out of
97)
Customer Reviews for Harman Kardon - Onyx Studio 8 Speaker, Black
Customer Rating
1
Stereo Boost Mode Won’t Stay Connected
on December 5, 2025
Posted by: DisappointedCustomer
from Opelika, AL
Gender:Male
I purchased two Harman Kardon Onyx Studio 8 units and tested them in stereo Boost mode. There’s a behavior that buyers should be aware of:
- Both speakers show solid white LEDs when Boost mode (stereo pair) is active.
- However, if Bluetooth disconnects and reconnects, stereo mode does not return.
- Only the primary speaker plays audio even though both units still display the Boost LED.
- The only way to restore stereo is to:
A. power-cycle both speakers, or
B. factory reset and manually pair them in Boost mode again.
- However, if Bluetooth disconnects and reconnects, stereo mode does not return.
- Only the primary speaker plays audio even though both units still display the Boost LED.
- The only way to restore stereo is to:
A. power-cycle both speakers, or
B. factory reset and manually pair them in Boost mode again.
HK support told me this is “normal and expected,” meaning stereo Boost mode must be manually reactivated every time Bluetooth reconnects. It was supposedly escalated, but I never received a follow-up.
Sharing this so others know before buying—persistent stereo pairing is not supported.
No, I would not recommend this to a friend.
Response from harmankardon.nlBy Customer Support, December 7, 2025
Thanks for sharing your feedback on our HK Onyx Studio 8. We value your input, and we'll make sure to forward your feedback to the appropriate team.
Written by a customer while visiting harmankardon.nl
Customer Rating
5
Amazing sound - bigger than I had anticipated
on December 5, 2025
Posted by: planogreg
This is a Christmas present for my son, but I had to test it, to make sure it worked, and the sound is amazing! it is bigger than I thought it would be.. but that is probably why the sound is also "big"
Written by a customer while visiting harmankardon.nl
Customer Rating
2
on December 5, 2025
Posted by: chris775
can't access bass and treble controls, need help thanks
Response from harmankardon.nlBy Customer Support, December 5, 2025
Thanks for bringing this to our attention. We recommend using a third-party music app with a built-in equalizer to modify the bass and treble.
Written by a customer while visiting harmankardon.nl
Customer Rating
5
Great features
on December 4, 2025
Posted by: Hsic17
Gender:Male
One of the best purchase great quality sound and well designed enjoyed it
I would recommend this to a friend!
Written by a customer while visiting harmankardon.nl
Customer Rating
5
on December 4, 2025
Posted by: chevelle
Recent purchase very happy with my purchase , went back to purchase another and they were sold out.
I would recommend this to a friend!
Written by a customer while visiting harmankardon.nl
Customer Rating
5
HKOS8
on November 29, 2025
Posted by: Javihinojosa
Great portable speaker! The deep bass fills the room with sound and the speaker is great looking.
Written by a customer while visiting harmankardon.nl
Customer Rating
5
HK NEVER DISAPPOINTS
on November 28, 2025
Posted by: J FLO33
from Texas
Gender:Male
HK never disappoints. Quality quality quality. That’s what you’re buying when you go HK. BMW knows this and so should you.
I would recommend this to a friend!
Written by a customer while visiting harmankardon.nl
Customer Rating
5
Great bass
on November 27, 2025
Posted by: Anonymous
from Philadelphia
Gender:Female
Love it great sound great product and invention:::
I would recommend this to a friend!
Written by a customer while visiting harmankardon.nl