Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker Black (LATEST MODEL!)
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Brand | Harman Kardon |
Speaker Maximum Output Power | 15 Watts |
Connectivity Technology | Bluetooth |
Audio Output Mode | Stereo |
Material | Plastic |
About this item
- Amplify your listening experience by wirelessly connecting more than 100 HK Connect+ enabled speakers
- The rechargeable battery supports up to 8 hours of playtime
- Stream music wirelessly via Bluetooth to enjoy room-filling sound Connect up to 2 smart devices at the same time and take turns playing music
- Access Siri or Google Now from the speaker with a simple button press This can be easily configured via the HK Connect App
- The superior fabric and finishing combines with iconic design to compliment any style
Top Brand: Harman Kardon
From the manufacturer
Wireless Bluetooth Streaming

Stream music wirelessly via Bluetooth to enjoy room-filling sound. Connect up to 2 smart devices at the same time and take turns playing music.
8 Hours of Playtime

The rechargeable battery supports up to 8 hours of playtime.
HK Connect+

Amplify your listening experience by wirelessly connecting more than 100 HK Connect+ enabled speakers.
What's in the box
Product information
Model Name | Onyx Studio 4 |
---|---|
Speaker Type | Woofer, Tweeter |
Special Feature | Wireless, Built In Microphone |
Recommended Uses For Product | Music |
Compatible Devices | Smartphone, Tablet, MP3 Player, Laptop |
Unit Count | 1.0 Count |
Controller Type | homekit, vera |
Color | B075BM52PJ |
Battery Life | 8 Hours |
Included Components | Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker Black (Latest Model!) |
Product Dimensions | 8.2"D x 12.2"W x 12.5"H |
Age Range (Description) | Adult |
Item Weight | 4.5 Pounds |
Is Waterproof | FALSE |
Charging Time | 8 Hours |
Maximum Range | 60 Meters |
Number of Items | 1 |
Control Method | App |
Wireless Communication Technology | Bluetooth |
Speaker Size | 31.75 Centimeters |
Power Source | Battery Powered |
Signal-to-Noise Ratio | 80 dB |
Number of Batteries | 1 A batteries required. |
Audio Driver Type | Dynamic Driver |
Bluetooth Range | 10 Meters |
Audio Latency | 50 Milliseconds |
Subwoofer Connectivity Technology | Wireless |
Connectivity Protocol | Bluetooth |
Includes MP3 player? | No |
Number of Power Levels | 1 |
Total Ethernet Ports | 1 |
Specific Uses For Product | personal audio entertainment, wireless music streaming, outdoor activities, home audio enhancement |
UPC | 028292280511 028292280719 |
Style | Single |
Global Trade Identification Number | 06925281926426, 06925281928116 |
Manufacturer | Harman Kardon |
Item Weight | 4.5 pounds |
ASIN | B075BM52PJ |
Item model number | HKOS4BLKEU |
Batteries | 1 A batteries required. |
Customer Reviews |
4.6 out of 5 stars |
Best Sellers Rank |
|
Is Discontinued By Manufacturer | No |
Date First Available | August 28, 2017 |
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Product Description
Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker Black (Latest Model!)
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers praise the speaker's sound quality, noting it sounds like a $1000 car stereo, and appreciate its solid construction and portability, being easy to carry outside. The device is simple to pair with devices and functions flawlessly, with one customer mentioning it works well for conference calls. Battery life and Bluetooth connectivity receive mixed reviews, with some customers reporting great battery life while others experience poor connectivity.
AI Generated from the text of customer reviews
Customers praise the sound quality of the speaker, noting its heavy bass and good volume, with one customer comparing it to a $1000 car stereo.
"...UE Hyperboom - This is the best sounding - but really not by enough to justify the price tag. I was willing and I was actually rooting for this one...." Read more
"...It is impressive in it's clarity, and bass, and fills a room with rich sound, not that normal tinny sound most bluetooth speaksers sound like." Read more
"...This thing puts out sound of much bigger speakers at a great price,I love it!..." Read more
"...It is amazing how good the bass is from this small speaker...." Read more
Customers praise the speaker's solid construction and high-quality output.
"...conditions, they still have a very good sound, very light weight and durable...." Read more
"Great quality speaker. The sound is great. There is one complaint...." Read more
"...of each, it is very clear that the depth and crisp-ness of the BASE is stronger and clearer on the older model than on this newer version...." Read more
"...Linking them together is simple too. The speakers have a high quality solid construction to them. Even one on its own sounds great!" Read more
Customers find the speaker well worth its price, offering great sound quality relative to its size and cost.
"...This thing puts out sound of much bigger speakers at a great price,I love it!..." Read more
"...you can overcome the app shortcomings this speaker is an excellent value for the price Amazon has it, $126...." Read more
"Great speaker is a steal for this price. I have 4 HK studio 6 that I played in stereo, 2 in bedroom and 2 in living room...." Read more
"...buying audio equipment for about 45 years and this is an absolute bargain on all fronts. Love it." Read more
Customers appreciate the speaker's portability, finding it lightweight and easy to carry outside, with one customer mentioning it travels around their townhouse easily.
"...Portability with travel...you are not gonna get much better than the Marshall Middleton if you are willing to eat that $299 price tag...." Read more
"...Even in these conditions, they still have a very good sound, very light weight and durable...." Read more
"...sounds wonderful, even outdoors when we swim, and is pretty easy to carry around the house with the built in handle...." Read more
"Like the size and weight expected better sound. Use it for my patio and living room." Read more
Customers find the speaker easy to use, with simple Bluetooth pairing and device connection.
"...Love that it is bluetooth and connects easily to phones and tablets for control. The H/K 4 has more options use than previous models...." Read more
"This little speaker is a champ! Connects easily to our iphone, ipad, etc...." Read more
"This is one of the best Bluetooth speakers ! Easily connected to iPhone using Apple or Amazon music...." Read more
"...They sound awesome on my deck or around my fire pit. Linking them together is simple too...." Read more
Customers find that the speaker works flawlessly and serves its purpose well, with one customer noting it performs particularly well for conference and group calls.
"...They work well with my iPhone 11 and iPad but not with iMac. That's on Apple and not the speaker...." Read more
"...So this works nicely for my musical tastes. I have been buying audio equipment for about 45 years and this is an absolute bargain on all fronts...." Read more
"Sound quality is unmatched, better than my Bose in fact. Clean, DEEP, bass, crystal clear treble and vocals...." Read more
"...I was amazed at the clarity, depth, bass, highs. Even considered picking up another one. The speaker also works great for conference or group calls...." Read more
Customers have mixed experiences with the speaker's battery life, with some reporting it lasts for hours while others find it only lasts about an hour.
"...Battery life is ok at this time, only been using for a couple of days and have not have to charged them after 3-4 hours of use...." Read more
"...The HK gives you a lot but again that battery issue should have been resolved...they know about it and have done nothing in the way of battery..." Read more
"Loves the sounds, very loud and tons of bass. Battery are ok, only thing the speaker are too big it good use for the house party, not easy caring..." Read more
"...to bring it everyone was impressed with the sound quality and battery life. The speakers bass is increased when its plugged in, a fun trick." Read more
Customers have mixed experiences with the speaker's Bluetooth connectivity, with some reporting difficulties connecting to devices.
"...Connects via Bluetooth through your cell phone or laptop...." Read more
"...This is amazing however, not being able to connect to the one thing that I would think most people have is a major flaw, ie Alexa...." Read more
"...This model can be daisy link with up to 100 other HK BT speakers, nice when you have a two story home or a mana cave in the basement...." Read more
"...I use them as a sound system for my apple tv. Linking them has some ineresting issues, i sometimes have to reboot the speakers to link them again..." Read more
Reviews with images

Harmon Kardon 4 vs. Marshall Middleton vs. UE Hyperboom
Top reviews from the United States
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- Reviewed in the United States on June 1, 2023Coming from a 7 year old Onyx 2...(which still sounds great) I was shocked to see how little the sound changed between the that and the 4...almost the same speaker. They both sound great and very clear...but they both suffer from the battery issue many have complained about here. The Onyx 2 no longer works without being plugged in (and I fear this will be the case with the 4 in a couple years)- but I needed something for my pool. My search began:
Remember - portable for the pool - so I looked at everything and not being a JBL fanboy I decided on the Marshall Middleton the Onyx 4 and the UE Hyperboom.
Marshall - really sounds great - very crisp sound and they get a lot out of this little speaker. If I was traveling a lot and bringing it to my room this would be my speaker. The most portable of the three - but the smallest sounding (which again, is still pretty damn good). Good bass - but not like the other two considering its $300.
UE Hyperboom - This is the best sounding - but really not by enough to justify the price tag. I was willing and I was actually rooting for this one. But when you are at a pool and the water feature is going on...are you really gonna see much difference in clarity? If you want to crank it - this is a better option. If you have neighbors and live on a golf course...it won't matter and the clarity of the the HK and the Middleton are both great...again $400..I did not see a significant jump in sound that "blew me away."
HK Onyx 4 - I have a 19 speaker HK system in my vehicle and my friends say it is the best sounding system in any car they have ever heard...and I tend to agree. My tastes run from Klipsch home systems to now the upgraded Sonos Arc with 4 surrounds and the large subwoofer....so I like good sound. The HK will not blow you away with power - it will sound great at a pool and your friends will say...WOW that sounds really good! If you want power go with JBL...but to me they all sound the same and again - to get something that will give you that kind of power....your back to over $400. The batteries on the HK 2 I had sucked and I fear this will be the case with the 4. I am very disappointed that the sound is not much - if at all - different...but the 2 was pretty perfect. I also got the HK 6 a couple months ago and played it for maybe 30 seconds - boxed it up and returned. Horrible in my opinion. I also dabbled with the Sony SRS-XG300. A beautiful speaker which sounds like it is playing underwater...again I did play with all these on the equalizer settings (which the HK does not have) to give them all a fair fight.
So if your gonna crank it up...$400 is no issue...go with the Hyperboom. Sound will not be that much different (especially if there is background noise like water features at pools etc.) But, it will crank louder than the HK and still give you some great sound quality.
Portability with travel...you are not gonna get much better than the Marshall Middleton if you are willing to eat that $299 price tag.
The HK gives you a lot but again that battery issue should have been resolved...they know about it and have done nothing in the way of battery (or sound really in my opinion - which again is not a bad thing) for the last 7 years. The price is a little high - but the sound quality is still 5 stars and that is what I am rating it on. Good luck in your own search - and when in doubt between 2...get them both and compare - Amazon makes it easy for returns.
5.0 out of 5 starsComing from a 7 year old Onyx 2...(which still sounds great) I was shocked to see how little the sound changed between the that and the 4...almost the same speaker. They both sound great and very clear...but they both suffer from the battery issue many have complained about here. The Onyx 2 no longer works without being plugged in (and I fear this will be the case with the 4 in a couple years)- but I needed something for my pool. My search began:Harmon Kardon 4 vs. Marshall Middleton vs. UE Hyperboom
Reviewed in the United States on June 1, 2023
Remember - portable for the pool - so I looked at everything and not being a JBL fanboy I decided on the Marshall Middleton the Onyx 4 and the UE Hyperboom.
Marshall - really sounds great - very crisp sound and they get a lot out of this little speaker. If I was traveling a lot and bringing it to my room this would be my speaker. The most portable of the three - but the smallest sounding (which again, is still pretty damn good). Good bass - but not like the other two considering its $300.
UE Hyperboom - This is the best sounding - but really not by enough to justify the price tag. I was willing and I was actually rooting for this one. But when you are at a pool and the water feature is going on...are you really gonna see much difference in clarity? If you want to crank it - this is a better option. If you have neighbors and live on a golf course...it won't matter and the clarity of the the HK and the Middleton are both great...again $400..I did not see a significant jump in sound that "blew me away."
HK Onyx 4 - I have a 19 speaker HK system in my vehicle and my friends say it is the best sounding system in any car they have ever heard...and I tend to agree. My tastes run from Klipsch home systems to now the upgraded Sonos Arc with 4 surrounds and the large subwoofer....so I like good sound. The HK will not blow you away with power - it will sound great at a pool and your friends will say...WOW that sounds really good! If you want power go with JBL...but to me they all sound the same and again - to get something that will give you that kind of power....your back to over $400. The batteries on the HK 2 I had sucked and I fear this will be the case with the 4. I am very disappointed that the sound is not much - if at all - different...but the 2 was pretty perfect. I also got the HK 6 a couple months ago and played it for maybe 30 seconds - boxed it up and returned. Horrible in my opinion. I also dabbled with the Sony SRS-XG300. A beautiful speaker which sounds like it is playing underwater...again I did play with all these on the equalizer settings (which the HK does not have) to give them all a fair fight.
So if your gonna crank it up...$400 is no issue...go with the Hyperboom. Sound will not be that much different (especially if there is background noise like water features at pools etc.) But, it will crank louder than the HK and still give you some great sound quality.
Portability with travel...you are not gonna get much better than the Marshall Middleton if you are willing to eat that $299 price tag.
The HK gives you a lot but again that battery issue should have been resolved...they know about it and have done nothing in the way of battery (or sound really in my opinion - which again is not a bad thing) for the last 7 years. The price is a little high - but the sound quality is still 5 stars and that is what I am rating it on. Good luck in your own search - and when in doubt between 2...get them both and compare - Amazon makes it easy for returns.
Images in this review
- Reviewed in the United States on December 21, 2022I have three of these speakers now. For the price you cannot find another speaker that sounds better. I marked it low on battery life and portability as it's more meant to stay plugged in and on a shelf, it's not really a drag to the beach kind of speaker. The battery will play for a decent while, but it's maybe a few hours. The shape of it is not conducive of stuffing in a backpack, and it needs a nice flat surface to sit on. HK makes a speaker that is more mobile called a G0 and Play model made especially for these tasks, so if you're on the go a lot and want this speaker's sound to follow, I'd check that model out. But this usually sits at the house on my desk playing, on the back porch table playing, or the one I keep on my toolbox at the shop playing all day. I cant add up how many people have walked by my tool box and asked what that speaker is, I play some songs for them, then I hear they ordred one too! It is impressive in it's clarity, and bass, and fills a room with rich sound, not that normal tinny sound most bluetooth speaksers sound like.
- Reviewed in the United States on April 15, 2023I heard a friend of mine’s speaker and have been wanting one for 2 years now. I finally pulled the trigger and bought one and I wasn’t disappointed. This thing puts out sound of much bigger speakers at a great price,I love it! The one issue I have with this speaker is that the instructions are practically nonexistent. I had to Google how to turn on the Bluetooth function as I found nothing in the instructions pertaining to this. It has a diagram telling you what each button is for but it didn’t say that you had to hold the Bluetooth button for up to 30 seconds to make a connection. Harmon Karman needs to include better explanations about how to use each button. Other than that I have no problem with this little powerhouse,I’m very happy with my purchase!
5.0 out of 5 starsI heard a friend of mine’s speaker and have been wanting one for 2 years now. I finally pulled the trigger and bought one and I wasn’t disappointed. This thing puts out sound of much bigger speakers at a great price,I love it! The one issue I have with this speaker is that the instructions are practically nonexistent. I had to Google how to turn on the Bluetooth function as I found nothing in the instructions pertaining to this. It has a diagram telling you what each button is for but it didn’t say that you had to hold the Bluetooth button for up to 30 seconds to make a connection. Harmon Karman needs to include better explanations about how to use each button. Other than that I have no problem with this little powerhouse,I’m very happy with my purchase!Huge sound in a small package!
Reviewed in the United States on April 15, 2023
Images in this review
- Reviewed in the United States on February 18, 2024I'm an old audiophile from the 70's. Once had a pair of Magneplanar speakers and all the other high end gear, including my own home made power amplifier. It is amazing how good the bass is from this small speaker. Modern signal processing technology allows the physical limitation of its size to be compensated for, yielding a hi-fi frequency response, and the only thing missing is stereo imaging.
- Reviewed in the United States on May 19, 2023This is a favorite on job sites. I have seen them covered in spackle, covered in paint, knocked around by tools. Even in these conditions, they still have a very good sound, very light weight and durable. I can't comment on battery life as my speaker has been continuously plugged in for years. Connects via Bluetooth through your cell phone or laptop. When receiving or making phone calls you will need to manually mute the speaker, it will not continue to play music in the background. I have no complaints of this speaker and would buy again.
Top reviews from other countries
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CthulhuReviewed in Spain on October 23, 2020
5.0 out of 5 stars Sonido perfecto: potente y brillante.
Tras más de dos años con él no me ha dado absolutamente ningún problema.
El sonido es impecable con un calidad que es muy superior a otros altavoces portátiles, graves potentes y agudos brillantes y muy bien definidos. Cuando lo enchufas para la carga, la potencia de sonido es mucho mayor, no obstante sin estar cargando también suena muy alto.
Duración de la batería: a máxima potencia, hay días que he visto tres películas sin tener que enchufarlo, teniendo en cuenta que se me olvida apagarlo y queda encendido mucho tiempo entre película y película, hasta que se apaga solo para ahorrar energía.
La estética es perfecta: elegante, sutil, discreto, pero a la vez bonito. Personalmente me gusta mucho más que cualquier altavoz cilíndrico. Por encontrar alguna virtud en estos últimos, quizás son más fáciles de transportar que el Harman Kardon. Yo transporto el HK Onyx 4 en su caja original, aunque existen también fundas por unos 20€. Viene con un cable de carga europeo y otro americano, por si viajas mucho entre países y necesitas llevarlo contigo.
Otro aspecto positivo es el modo conferencia, mientras estás escuchando tu música y estas conectado con el móvil vía bluetooth, el altavoz para la música y tiene su propio tono de llamada, contestas y puedes hablar muy bien a una distancia considerable del dispositivo.
Quizás lo que menos me gusta es la app de Harman Kardon para el móvil, aunque en realidad solo la utilizas para ver el nivel de carga del altavoz. Ahora bien, esta app sí que es necesaria para conectar dos altavoces entre ellos, pudiendo crear un modo estéreo. Personalmente, aún no he tenido la oportunidad de poseer dos y ponerlos a prueba, pero si tengo que comprarme otro, va a ser uno igual que este sin duda.
CthulhuSonido perfecto: potente y brillante.
Reviewed in Spain on October 23, 2020
El sonido es impecable con un calidad que es muy superior a otros altavoces portátiles, graves potentes y agudos brillantes y muy bien definidos. Cuando lo enchufas para la carga, la potencia de sonido es mucho mayor, no obstante sin estar cargando también suena muy alto.
Duración de la batería: a máxima potencia, hay días que he visto tres películas sin tener que enchufarlo, teniendo en cuenta que se me olvida apagarlo y queda encendido mucho tiempo entre película y película, hasta que se apaga solo para ahorrar energía.
La estética es perfecta: elegante, sutil, discreto, pero a la vez bonito. Personalmente me gusta mucho más que cualquier altavoz cilíndrico. Por encontrar alguna virtud en estos últimos, quizás son más fáciles de transportar que el Harman Kardon. Yo transporto el HK Onyx 4 en su caja original, aunque existen también fundas por unos 20€. Viene con un cable de carga europeo y otro americano, por si viajas mucho entre países y necesitas llevarlo contigo.
Otro aspecto positivo es el modo conferencia, mientras estás escuchando tu música y estas conectado con el móvil vía bluetooth, el altavoz para la música y tiene su propio tono de llamada, contestas y puedes hablar muy bien a una distancia considerable del dispositivo.
Quizás lo que menos me gusta es la app de Harman Kardon para el móvil, aunque en realidad solo la utilizas para ver el nivel de carga del altavoz. Ahora bien, esta app sí que es necesaria para conectar dos altavoces entre ellos, pudiendo crear un modo estéreo. Personalmente, aún no he tenido la oportunidad de poseer dos y ponerlos a prueba, pero si tengo que comprarme otro, va a ser uno igual que este sin duda.
Images in this review
- BernadetteReviewed in Australia on February 24, 2020
5.0 out of 5 stars Brilliant speaker
This speaker is a brilliant addition to my home. Super Bassy.... fills the home with smooth tunes :)
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Emmanuele EspositoReviewed in Italy on December 5, 2019
5.0 out of 5 stars Spettacolari
Allora inizio questa recensione solo dopo aver provato il prodotto e fatto il rodaggio iniziale, ne ho prese 2 approfittando del Black friday per usarli in stereo e devo ammettere che valgono anche a prezzo pieno, il suono e straordinario superiore anche al mio ex onyx 5, molto più pulito equilibrato e con la giusta separazione degli strumenti. Collegandone 2 sto ascoltando musica da quando li ho comprati non riesco più a farne a meno, possiedo il Marshall woburn che è il mio punto di riferimento e devo ammettere che in coppia sono più piacevoli gli onyx, possiedo anche un vifa oslo di cui ho avviato il reso dopo aver provato gli onyx in coppia, il vifa non mi ha mai entusiasmato no che suoni male anzi ma e solo un suono pulito niente di atmosferico con un problema che nessuno ne parla che sarebbe al massimo del volume se un brano è un po' più carico di bassi emette un rimbombo strano e poi 230w di fantasia secondo la mia esperienza sarà un 60w reale. Comunque consiglio questo prodotto ad occhi chiusi se ne sono 2 rimarrete stupefatti dall'effetto stereo attivabile dall app dedicato, se usate file di alta qualità dove la registrazione e all'altezza sentirete la separazione come è stata concepita, buon acquisto a tutti
- Kizito AllanReviewed in the United Arab Emirates on March 17, 2022
5.0 out of 5 stars Quality sound
I will give 5 stars given the size of the build and the quality sound coming out of it.
One small thing that bothers me is the inability from Harman Kardon to integrate the battery metre software on the product.
A visible battery metre would be so nice to guage how much juice you still have on the speaker.
Nevertheless, I recommend this product to anyone enjoying good quality music.
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Amazon CustomerReviewed in Turkey on September 27, 2018
5.0 out of 5 stars Arabada Rolls Royce, Hoparlörde Harman Kardon
Zarif ve şık, görüntüsünü anlatmaya gerek yok görüyorsunuz.
Ses konusunda HK Aura Kadar derin basslar içermese de mükemmel bir optimizasyonu var.
Pili uzun süre kullanmaya müsait 3 oda öteye gitseniz bile bağlantısı kopmuyor
şarj göstergesini studiolarda beğenmiyorum. zira bitipte kırmızı uyarı verene kadar pek anlaşılmamakta.
onyx mini deki gibi şarj gösterge ledlerinden studio içinde olması güzel olurdu.
Important information
Visible screen diagonal
0" / 0 cm