








🎶 Elevate Your Sound Experience!
The harman/kardon HKOS4BLKEU Onyx Studio 4 is a portable Bluetooth speaker that delivers exceptional sound quality, allowing you to stream music wirelessly. With a rechargeable battery offering up to 8 hours of playtime, dual device connectivity, and the ability to connect with over 100 other speakers, it's perfect for both personal enjoyment and social gatherings. The built-in microphone and voice assistant access make it a versatile choice for music lovers and professionals alike.



| ASIN | B075BM52PJ |
| Best Sellers Rank | 4,130 in Portable Bluetooth Speakers |
| Colour | Black |
| Compatible devices | Laptop,Tablet,Smartphone |
| Control method | App |
| Guaranteed software updates until | unknown |
| Included components | Bluetooth Speaker |
| Is waterproof | Yes |
| Item model number | HKOS4BLKEU |
| Item weight | 4.5 Pounds |
| Manufacturer | Harman |
| Maximum range | 60 Metres |
| Number of items | 1 |
| Power source | Battery Powered |
| Product dimensions | 20.8D x 31.8W x 31H centimetres |
| Speaker size | 31.75 Centimetres |
| Surround-sound channel configuration | 2.0 |
| Warranty type | Limited |
| Wireless communication technology | Bluetooth |
G**B
Superb, ideal for Bassy music
Pros - Very bassy, makes modern music (e.g Post Malone, Drake etc) sound amazing. Can still provide a clear sound for less bassy genres; I’ve recently been listening to some UB40 and it sounds fantastic on the HK Battery life is good, will last a night of playing music quite loud, ideal for party scenarios. Sound fills the room. If you were to buy two, you can link together using an app, which could turn your house into a small nightclub. Cons - Can provide too much bass on songs that wouldn’t usually have bass. Quite large but produces sound of a much bigger speaker
C**N
Best bass in a budget speaker
Amazing. Loud and boomy. Sounds like I’m at a concert super bass and crisp highs, very happy with my purchase :) thank you Harman, I use this mainly plugged in at my desk and it has never died even when I took it out else where and when plugged in it is louder and a small bit bassier I am in love with the design, looks very expensive!! I love it!! :)
N**E
Quality
As someone else review, I am not someone who normally completes them. Did some research on this before purchasing and its quality is amazing. All I can say is get this, you will not be disappointed. Amazing sound, for all genres of music, its becomes noticeably bassier when plugged in, but saying that was 100% happy with it just sitting on the side playing music, great quality, great sound, cannot rave about this enough
M**A
No better speaker under £250
It’s not the most portable but it is the best sounding speaker under £250 by a wide margin. You simply don’t get decent bass from small units which the HK delivers in droves along with treble that has none of the harshness small units have. I now have two of these (you can daisy chain as many as you want) and you can play in stereo or duplication mode using the HK app. Two sound awesome and for parties the volume and quality is well worth the expense,
C**V
GREAT SPEAKER
The speaker was larger than I expected but the sound quality is brilliant - I have it connected with a jack rather than bluetooth as the bluetooth kept turning off. I would recommend this speaker but you need a good space to home it.
D**N
Please keep producing these!
Absolutely fantastic product. I have bought three studio 3’s one studio 4 and a mini onyx and a pair of 4’s for friends in the US. The sound quality is stunning. What a shame they are so difficult to find now, there is nothing of the same quality for the price in the market currently... in my opinion.
A**R
No better speaker for the price.
Big Harmon Kardon fan, and have 2 onyx mini's that I pair together which sound great. Thought I'd give the bigger version a go. All I can say is WOW. The sound is incredible. The bass shakes the room but doesn't get to much. All the music I've thrown at it so far has been beautiful to listen too. Thinking I may buy another to pair them together for a great sound experience.
R**R
Not working well can we exchange for another one like that
Because the the speaker doesn't charge it is not working properly
C**U
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.
B**E
This speaker is a brilliant addition to my home. Super Bassy.... fills the home with smooth tunes :)
E**O
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
K**N
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.
A**R
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.
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