Customer Ratings & Reviews

Absolutely love the speaker. Great sound and bass.

i love the bass and it’s portable everywhere I go!

I picked this up while it was on sale for $150. Hands down the best speaker in that price range. Incredible bass and clear sound. Looks cool too.....

It is not the big boom that you would think. But it does sound very good. I thought the sound wouldn't be that good because of the size, but I was wrong. Great speaker.

The sound and bass are amazing for the size of the speaker. It's a rich clean sound and the speaker itself is very stylish and looks good wherever you put it.

These speakers are incredibly lightweight and are truly portable. The sound quality is impeccable - and the bass really ended up sealing the deal. BEST. SPEAKERS. EVER. Worth every single cent.

This speaker is great! Has great sound and bass. Would definitely buy it again. It has great quality sound. It is easy to use. Love this speaker.

This Bluetooth speaker works and sounds great. Battery last long and will continue to play plugged-in. It has a jack for an iPod too. Fills a large room with great sound. Highly recommend.

I was going to purchase the Bose evolve and then the salesman showed me this!!! It is awesome, great sound quality, loud, great bass. Very happy w this purchase!

The bass and sound quality are amazing. My brother has this speaker and I was amazing by the fact that it’s a portable speaker. I can’t wait to buy another one.

I’ve bought two to sync and use the stereo functionality. I am really enjoying, but the HK app can improve a lot. Sometimes it takes a while to find the device and it doesn’t have other sound controls. At the end of the day what matters is the sound quality which is pretty good for a device this size.

Super pleased with how well this speaker sounds. It has amazing bass and can fill a room. For a relatively small footprint, it is an absolutely fantastic speaker!

Bought two of these, to pair them together and can't believe the sound quality that they put out! Please read : You can buy blue tooth speakers any where and everywhere, but I promise that you will not get the same sound quality these speakers will produce! The other's get as loud, but the sound quality is not there! These are plenty loud enough and the sound quality remains the same at full Valume Harmon Kardon has been around for decades and they know how to make excellent products to this day! The other's get loud but you loose the sound quality and they have hardly any base. I guarantee that you will not be disappointed with the Onyx 4

This bluetooth speaker delivers deep bass undertones and phenomenal sound. I haven't been able to stop using yet. Not to mention the battery has decent life to it.

I love it. The sound is clear and it’s pretty loud. Like that you can transport it anywhere. It has a groove in the back to handle it. The charge lasts about 8 hours. Great buy!

This speaker provides excellent sound for such a small unit. I would highly recommend this to anyone desiring a quality BT speaker at a reasonable price.

Love the sound and the effects Its wonderful just thought would be a little smaller in size but for the quality size is Ok. The battery power sucks a bit it Takes 5 hours to charge and drains quick to. Wish they work on the battery power rest it is worth the money. Price for quality

So I have had several Bluetooth speakers in the past and this Harmon/ Kardon is an amazing speaker that has amazing sound! I got this speaker for only $145.00 and the original price was $495.00. I will take $350.00 off anytime!! Highly suggest this speaker for your listening needs!

Loud enough to make my wife complain. Bass is deep. Awesome that it is portable. Well worth the money (it was on sale for $99).

Excellent product. Sound is phenomenal, easy to set-up and use. Also, can be combined with other units. I’d buy more than one