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4.84.8 out of 5 stars
981 product ratings

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782 reviews

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This is a great bluetooth speaker

I Really like my bluetooth speaker. Now I got 2 of the same speaker. On my Galaxy S 8 I can do dual Audio. I can play the same speaker. It sounds awesome.

Verified purchase:  Yes • Condition: pre-owned • Sold by: poppy9780

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HK Onyx 4 2nd to None

I recently purchased the HK Onyx 4 Bluetooth speaker. I was astounded by the sound quality and sound of the music that came out of the speaker knowing that it has the capability HK technology allowing it to connect to up to 100 speakers is super you could make a super party or super concert from being able to do so with this technology the sound quality is awesome love the speaker had to order a second one. 2 days after receiving my first Speaker within the same week get one you won't be disappointed.Read full review

Verified purchase:  Yes • Condition: new • Sold by: dgwholesale

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Harman Kardon Onyx Studio 4

I own both the Bose Soundlink and a Bose Revolve.Both great products.
The HKOS 4 will blow you away !!
Sound is clear and bass is amazing.
Even at higher levels it does not distort.
Battery life is excellent.
It is large (11” in diameter).
We use outside for cookouts and our guests just can’t believe that much sound is coming from one speaker. Very satisfied and highly recommend. Read full review

Verified purchase:  Yes • Condition: new • Sold by: redtagcamera

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This speaker is awesome

The sound quality is second to none. I couldn’t be happier with this speaker. Only drawback is the app it has a delay but if you press play then pause and play again it speeds up. The speaker itself can’t be beat. Great purchase. Worth every penny. Excellent price and was well packed so it wouldn’t be damaged. Read full review

Verified purchase:  Yes • Condition: pre-owned • Sold by: jams_sounds

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Good stuff

Good sound for the money, like the battery feature, good connectivity with Bluetooth. Overall a great product.

Verified purchase:  Yes • Condition: pre-owned • Sold by: mg1431

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WOW!

I am a music enthusiast. As a retired Navy Veteran there are few things that I have found provides some relief as I traverse through this world with often mind numbing PTSD.

I recently starting with attempts to be more social and travel to some family and outdoor events. This speaker will further provide some comfort and relaxation to attend family events and still be engaged without the use of headsets.

Everyone enjoys quality music of their preferred Genre. This Harman Kardon Black Onyx 4 series is superb in providing quality clarity of music from Gospel, Indie Rock, R&B Jazz and etc.

My Sincerest and Heartfelt thanks to the EBay seller from whom made this purchase possible for me. He will never know just how much just in this short period that I have had this incredible appliance in my home, just how significantly this has impacted my life in such a positive way!

Thank you....Read full review

Verified purchase:  Yes • Condition: new • Sold by: ydoc69

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Onyx 4 awesome speaker!

This speaker is a bluetooth an absolute awesome sounding machine. From its round easy to carry handle design to its 8 hour wireless charge. Is probably the best speaker I have ever owned. And I've also got a bose bluetooth speaker and there's no comparison to this onyx 4 speaker. You cant go wrong and you will absolutely love the sound quality of this speaker. Hardon kardon is the best bluetooth in 2019!!Read full review

Verified purchase:  Yes • Condition: new • Sold by: best_buy

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Harmon/Kardon Onyx Studio 4

Excellent sound quality with clean base. I tested many speaker brands including Bose and JBL before making this purchase. They sound as good as they look. I even bought a second as a housewarming gift.Read full review

Verified purchase:  Yes • Condition: new • Sold by: bestbuywholesale1

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New and Improved in every way! Great Speaker!

Excellent sound, Very Good hands free conference, good battery life!

I had an original onyx studio that served me well for many years. The improvments in sound and the addition of bluetooth phone and linkable to other onyx studio 4 speakers makes this a great buy!
Read full review

Verified purchase:  Yes • Condition: pre-owned • Sold by: everydaygrinding

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Cheaper version of Sonos with much better sound quality

I bought three of these speakers and three audio Chromecasts to make my own WiFi speaker setup. I’m so glad i did. Really easy to setup and the sound quality is 10x better than Sonos. Do yourself and your ears a favor and go this route if your looking to setup a whole house speaker system.Read full review

Verified purchase:  Yes • Condition: new • Sold by: jackandjill428

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