Customer Ratings & Reviews

Bought HK Studio 4 on Best Buy. I read the review first before buying online. The reviews were great and enticed me to buy the item. When I tested the item. The reviews were all accurate. The clarity and the quality of sounds and the base was just right for me. Glad I bought this item. I recommend it to everyone.

Clear sound, deep bass, & all the volume. Great for chilling outside, hanging out in the living room, or in the basket of my bike. Play some Space Jesus on this thing & change the game.

Best money can buy, especially if you get it on sale for $150 during promotion. As with all devices, battery is great starting off but will eventually deplete. Bass is great and clear. Sounds awesome for such a small device. Definitely recommend it for parties or small gatherings. You won’t be disappointed.

Aesthetics 5/5: The Onyx Studio 4 was a perfect fit for our living room audio needs. It was stylish, fit in to our décor, and has a streamlined look to it. Audio 3.5/5: Overall great sound from a portable speaker, and a job well done by Harmon. Quite a bit bass heavy though, and not the most balanced sound, but perfect for playing some background music with company over or throwing a party. Fills a much large room with great sound. Amazing sound, just don't expect a flat frequency audiophile level response you can get from a great 2 channel system. Features: 3.5/5: Bluetooth and direct connection via 3.5mm jack are the only connection options, sadly. No streaming, no Wifi / DLNA connectivity, etc. But... this unit is battery powered and it is perfect for bringing outside for a BBQ or to the beach for some tunes while you relax outdoors. Value 5/5: When you can pick this up for less than 2 benjamins, and have a great speaker that can blow away most of the competition at this price point, it's a no brainer. While I wish it had DLNA capability, I can just stream my playlists to my phone and have the phone play via Bluetooth to the speaker. Perfect solution.

Great speaker!!! Love the size...not ot big not to small...Love the versatility that it brings....really great lows compared to other wireless bluetooth speakers which is noticeable when listening to latin music (salsa, merengue, bachata, reggaeton) and hip hop. Love the feature of being able to connect 2 devices at the same time. The only set back is at times it can be a pain to connect. For whatever reason it isnt recognized as quickly as one would like. maybe harman would consider making this waterproof. Making it the most perfect bluetooth speaker in the world! This is me just knit picking. Definitely worth the money spent. Makes a great gift for music lovers!

I love this speaker. I had the 3 but this one is great. It hooks up fast when connected to Bluetooth and is just a great sound. I love the design is looks cute anywhere I put it. I told my sister about the great sale and she brought one within the 10 minutes lol.. we don't play about are sales!

I ended up buying 2 of these, 1 for my daughter and 1 for my husband, they both love it. it is easy to connect to, has great base and volume and a long lasting charge. Grab this one!

I cant say enough about this product, and the fact that I picked it up in December 2017 on sale for $129.00 makes it the deal of the century! Hindsight I should have bought two. The speaker produces rich highs and mids and incredible bass. The speaker appears to have a 'bass radiator' in the back, so if you place it in a corner the bass amplifies and can be tuned by how far you move it closer or further from the corner. The battery lasts quite a while, but I've noticed the volume is limited when on battery as compared to when it's plugged in with the power adapter. I assume that's to conserve play time. Overall a fantastic product. I highly recommend!

I've had this speaker now (second one like this brand/style) for a couple years now. I use it frequently. The sound is rich and I feel the quality is top notch. Decent number of hours per charge (I usually keep mine plugged in though). The original one now is the everyday speaker in my shop. It plays for hours (plugged in of course). The sound in the older one is as good as it was when I first got it. These speakers are easy to connect/disconnect with bluetooth. I will probably buy a third one just like this if either of these stop working.

I only went for 20% and I could listen to it outside of the room. A weird size for a portable speakers but the sound is loud and clear. Great speaker.

Amazing high end sound from a Bluetooth speaker, loud enough to fill a backyard while entertaining, good battery life between charges and easy to use

Impressive rich and deep sound, easy to pair , not impressed with the app. Wouldn’t recommend for using it as a portable speaker because it’s size. Filled my living room with superb sound and great bass definition. Love it! Definitely recommend to buy it when is on special.

My first Bluetooth speaker Harman Kardon. I got these for off price $300. Its great sound and so easy to connect.

Wow, the sound is incredible. The ease of set up and the easy of moving them from inside to outside is as easy as putting your shoes on and off. I will never go back to wired speakers. These are incredible. I am certain they sound better than Bose!

Hands down. This is the best portable speaker on the market the sound that comes out of this thing is amazing and that bass wow very impressed and I’m a Bose guy but this speaker just takes it to a new level battery does last 6 to 7 hours.

I got this bluetooth speaker on sale for 149, down from 459. This thing is amazing! Can be heard throughout the entire house. Sound quality is superior to anything else I have ever tested and the bass is great for such a small device.

Sound is clear, bass is amazing, and it pairs well with Smartphones. Easy to set up on phone. Well worth the price.

Beautiful, great bass, nice and elegant design. Mic option. Good battery life. Great sound reproduction in general.

I can not possibly say enough good things about this speaker. Sound quality, clarity and bass are second to none, Especially in this price range. Harmon Kardon makes high quality speakers and this does not disappoint. If I had to gripe about something, I would like to see a bigger battery. Since this only lasts for 8 hours, which is plenty but it’s always nice to have more.

I used it in our church Parish Hall. All the workers and volunteers thought there was a live band playing. It filled the room with fantastic sound. Most definitely a great speaker!