---
product_id: 48930871
title: "harman/kardon HKOS4BLKEU Onyx Studio 4 Portable Bluetooth Speaker - Black"
brand: "harman"
price: "246 Lei"
currency: RON
in_stock: true
reviews_count: 13
url: https://www.desertcart.ro/products/48930871-harman-kardon-hkos4blkeu-onyx-studio-4-portable-bluetooth-speaker-black
store_origin: RO
region: Romania
---

# Connect 2 devices Room-filling sound 8 hours playtime harman/kardon HKOS4BLKEU Onyx Studio 4 Portable Bluetooth Speaker - Black

**Brand:** harman
**Price:** 246 Lei
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate Your Sound Experience!

## Quick Answers

- **What is this?** harman/kardon HKOS4BLKEU Onyx Studio 4 Portable Bluetooth Speaker - Black by harman
- **How much does it cost?** 246 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/48930871-harman-kardon-hkos4blkeu-onyx-studio-4-portable-bluetooth-speaker-black)

## Best For

- harman enthusiasts

## Why This Product

- Trusted harman brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Party Mode Ready:** Wirelessly link over 100 HK Connect+ enabled speakers for a sound system that rocks any gathering.
- • **Unleash Your Sound:** Stream music wirelessly with Bluetooth for an immersive audio experience.
- • **Built-in Conferencing:** Seamlessly switch to conference calls with the built-in microphone system.
- • **Voice Assistant Access:** Control your music and more with Siri or Google Now at the touch of a button.
- • **Dual Device Connectivity:** Easily connect up to 2 smart devices and take turns sharing your favorite tracks.

## Overview

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.

## Description

Product Description harman/kardon HKOS4BLKEU Onyx Studio 4 Portable Bluetooth Speaker - Black Box Contains 1 x Harman Kardon Onyx Studio 4, 1 x Power adaptor, 1 x Quick start guide, 1 x Safety sheet, 1 x Warranty card

Review: 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
Review: 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!! :)

## Features

- 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.
- The rechargeable battery supports up to 8 hours of playtime
- Amplify your listening experience by wirelessly connecting more than 100 HK Connect+ enabled speakers
- Built-in Microphone Conferencing System
- Access Siri or Google Now from the speaker with a simple button press. This can be easily configured via the HK Connect App.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| 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 |

## Product Details

- **Audio output mode:** Stereo
- **Brand:** Harman
- **Connectivity technology:** Bluetooth
- **Material:** Plastic
- **Model name:** HKOS4BLKEU
- **Mounting type:** Independent
- **Recommended uses for product:** Universal
- **Speaker maximum output power:** 15 Watts
- **Speaker type:** Portable
- **Special feature:** Bluetooth, Hands Free

## Images

![harman/kardon HKOS4BLKEU Onyx Studio 4 Portable Bluetooth Speaker - Black - Image 1](https://m.media-amazon.com/images/I/61HluToKbTL.jpg)
![harman/kardon HKOS4BLKEU Onyx Studio 4 Portable Bluetooth Speaker - Black - Image 2](https://m.media-amazon.com/images/I/41vU3JXDUkL.jpg)
![harman/kardon HKOS4BLKEU Onyx Studio 4 Portable Bluetooth Speaker - Black - Image 3](https://m.media-amazon.com/images/I/41EHZ89QcPL.jpg)
![harman/kardon HKOS4BLKEU Onyx Studio 4 Portable Bluetooth Speaker - Black - Image 4](https://m.media-amazon.com/images/I/41KIb8VTG6L.jpg)
![harman/kardon HKOS4BLKEU Onyx Studio 4 Portable Bluetooth Speaker - Black - Image 5](https://m.media-amazon.com/images/I/41SyFlGEzwL.jpg)

## Questions & Answers

**Q: Does this speaker have a remote control**
A: No it doesn't. You have an app in your phone, so you can use your phone as the remote.

**Q: Can you charge and play at the same time?**
A: Yes you can charge and play at the same time.

**Q: Is the mesh on the speaker a hard mesh or a soft cloth mesh?**
A: hard mesh

**Q: How many watts?**
A: 60 watts when plugged in and 30 watts unplugged. It's that loud though, I cant have it full volume even at 30 watts unplugged.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Superb, ideal for Bassy music
*by G***B on 16 October 2018*

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

### ⭐⭐⭐⭐⭐ Best bass in a budget speaker
*by C***N on 31 October 2019*

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!! :)

### ⭐⭐⭐⭐⭐ Quality
*by N***E on 25 November 2019*

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

## Frequently Bought Together

- harman/kardon HKOS4BLKEU Onyx Studio 4 Portable Bluetooth Speaker - Black
- Colgate Sensitive Instant Relief Repair + Gentle Whitening Toothpaste | Instant* and long-lasting** sensitivity relief | Protective layer with calcium** | Fluoride toothpaste | 4 pack, 75ml tubes

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-03-10*