---
product_id: 699736090
title: "Onyx Studio 9 - Portable Stereo Bluetooth Home Speaker with Built-in Battery and USB Charging, self-Tuning, and Multi-Speaker Connection by Auracast - Black"
brand: "harman kardon"
price: "€ 504.32"
currency: EUR
in_stock: true
reviews_count: 13
category: "Harman Kardon"
url: https://www.desertcart.nl/products/699736090-onyx-studio-9-portable-stereo-bluetooth-home-speaker-with-built
store_origin: NL
region: Netherlands
---

# Self-tuning dynamic sound 8-hour rechargeable battery Multi-speaker wireless pairing Onyx Studio 9 - Portable Stereo Bluetooth Home Speaker with Built-in Battery and USB Charging, self-Tuning, and Multi-Speaker Connection by Auracast - Black

**Brand:** harman kardon
**Price:** € 504.32
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your sound game—wherever life takes you.

## Quick Answers

- **What is this?** Onyx Studio 9 - Portable Stereo Bluetooth Home Speaker with Built-in Battery and USB Charging, self-Tuning, and Multi-Speaker Connection by Auracast - Black by harman kardon
- **How much does it cost?** € 504.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/699736090-onyx-studio-9-portable-stereo-bluetooth-home-speaker-with-built)

## Best For

- harman kardon enthusiasts

## Why This Product

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

## Key Features

- • **8-Hour Portable Power:** Take your music anywhere with a long-lasting rechargeable battery that keeps the party going all day.
- • **Wireless Stereo Boost:** Pair two Onyx Studio 9 speakers for an expansive, immersive soundstage that commands attention.
- • **Smart Self-Tuning Audio:** Automatically calibrates to your environment for flawless sound clarity wherever you place it.
- • **Built-in USB Charging Port:** Keep your devices powered up while streaming, so you never miss a moment or a call.
- • **Seamless Dual Bluetooth Pairing:** Connect two devices simultaneously and effortlessly switch playlists without missing a beat.

## Overview

The Harman Kardon Onyx Studio 9 is a premium portable Bluetooth speaker featuring an 8-hour rechargeable battery, smart self-tuning technology for optimal sound in any environment, and the ability to wirelessly pair two speakers for enhanced stereo performance. With a built-in USB charging port and app-controlled customization, it’s designed for seamless, high-fidelity audio on the go.

## Description

Elevate your everyday listening to an extraordinary sound experience with the Harman Kardon Onyx Studio 9. This elegant wireless Bluetooth® movable home speaker delivers superior audio performance with crystal-clear vocals, bright highs, and deep bass that make your favorite music feel thrillingly immersive. Constant Sound Field technology widens the soundstage and improves the clarity and detail of your music. The substantial integrated handle (made with 90% recycled aluminum) and built-in battery with 8 hours of playtime make the Onyx Studio 9 easy to move with you in and around your home, and a built-in USB port recharges your device while you enjoy your music. And thanks to automatic self-tuning, it always delivers the best possible sound performance wherever you set it down.

Review: Best speaker I've owned yet - I love Harman Kardon speakers. My last one broke and I decided to finally suck it up & buy another one. Yeah it's expensive, but honestly these certain speakers are expensive for a reason. The bass & overall sound on it is phenomenal. You don't even need to crank it all the way up to be able to hear it from across the house, but then again my house is pretty empty. The battery life is wonderful. I can play it for hours & hours before it's ready to charge again & even when it does need charging it makes a clear sound to warn you rather than just shuttinf off completely. Connecting to my phone is super easy.
Review: My Mind Has Been Blown! - I was expecting something good, but I'm blown away! These speakers sound good enough to use full time in a small to medium size room. I wanted a good portable stereo system that I can set up on the go, and also use in my motorhome for music and theater sound (the Bose soundbar in the RV is just okay, but not immersive in the least). These speakers far surpassed my expectations, even compared to decent wired speakers. The fact that they are battery powered, while also being crammed full of audiophile-level engineering, has my mind boggled! How did they do that? Major kudos to the engineers at Harmon Kardon!

## Features

- Bluetooth music streaming: The Harman Kardon Onyx Studio 9 pairs seamlessly with up to two mobile devices simultaneously. Take turns sharing playlists and music, all in enhanced, dynamic sound.
- Built-in battery: With its rechargeable built-in battery, you can enjoy the Harman Kardon Onyx Studio 9 anywhere in your home, and easily transport it from one room to another for up to 8 hours of playtime
- Self-Tuning: Enjoy perfect sounds wherever you take the music. When you power on, the Onyx Studio 9 automatically calibrates to its environment, ensuring the best sound possible no matter where you set it down.
- Boost stereo sound with two speakers: Quickly and easily turn up the celebration with a wider, more detailed soundstage by pairing two Onyx Studio 9 speakers together, wirelessly.
- USB Charging port: Never worry about your mobile device running out of juice while you're streaming your favorite audiobook. The USB charging port means you and your device will always be ready for anything.
- Harman Kardon One App: The Harman Kardon One app helps you easily set up the Onyx Studio 9 and personalize audio settings. You can also customize EQ and control all your compatible speakers in one convenient place.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DMHLTDBX |
| Audio Driver Type | Dynamic Driver |
| Batteries | 1 9V batteries required. (included) |
| Best Sellers Rank | #266 in Portable Bluetooth Speakers #2,605 in MP3 & MP4 Player Accessories |
| Compatible Devices | Desktop, Laptop, Smartphone, Tablet |
| Control Method | App |
| Customer Reviews | 4.7 4.7 out of 5 stars (258) |
| Date First Available | February 10, 2025 |
| Included Components | 1 x Harman Kardon Onyx Studio 9, 1 x Power Cable, Quick Start Guide, Safety Sheet, Warranty Card |
| Is Waterproof | False |
| Item Weight | 9.35 pounds |
| Item model number | HKOS9BLKAM |
| Manufacturer | Harman Kardon |
| Material | Metal |
| Model Name | HK Onyx Studio 9 |
| Mounting Type | Floor Standing |
| Number of Batteries | 1 9V batteries required. (included) |
| Number of Items | 1 |
| Power Source | Battery Powered |
| Product Dimensions | 5.12"D x 11.39"W x 11.32"H |
| Set Name | Onyx Studio |
| Shape | rectangular prism |
| Signal-to-Noise Ratio | 80 dB |
| Speaker Size | 13 Centimeters |
| Speaker Type | Portable Speaker |
| Special Feature | Built-In Powerbank, Lightweight, Multi Room Audio, Portable, USB Port |
| Surround Sound Channel Configuration | 3.0 |
| UPC | 028292291104 |
| Unit Count | 1.0 Count |
| Warranty Type | Limited |
| Wireless Communication Technology | Bluetooth |

## Product Details

- **Audio Output Mode:** Stereo
- **Brand:** Harman Kardon
- **Connectivity Technology:** Bluetooth, USB
- **Frequency Response:** 20000 KHz
- **Speaker Maximum Output Power:** 50 Watts

## Images

![Onyx Studio 9 - Portable Stereo Bluetooth Home Speaker with Built-in Battery and USB Charging, self-Tuning, and Multi-Speaker Connection by Auracast - Black - Image 1](https://m.media-amazon.com/images/I/51-+0RVO3hL.jpg)
![Onyx Studio 9 - Portable Stereo Bluetooth Home Speaker with Built-in Battery and USB Charging, self-Tuning, and Multi-Speaker Connection by Auracast - Black - Image 2](https://m.media-amazon.com/images/I/71SQ3QFRWqL.jpg)
![Onyx Studio 9 - Portable Stereo Bluetooth Home Speaker with Built-in Battery and USB Charging, self-Tuning, and Multi-Speaker Connection by Auracast - Black - Image 3](https://m.media-amazon.com/images/I/81RTY-MwuJL.jpg)
![Onyx Studio 9 - Portable Stereo Bluetooth Home Speaker with Built-in Battery and USB Charging, self-Tuning, and Multi-Speaker Connection by Auracast - Black - Image 4](https://m.media-amazon.com/images/I/81VjEqv9zcL.jpg)
![Onyx Studio 9 - Portable Stereo Bluetooth Home Speaker with Built-in Battery and USB Charging, self-Tuning, and Multi-Speaker Connection by Auracast - Black - Image 5](https://m.media-amazon.com/images/I/91I4HYkPSFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best speaker I've owned yet
*by S***N on November 27, 2025*

I love Harman Kardon speakers. My last one broke and I decided to finally suck it up & buy another one. Yeah it's expensive, but honestly these certain speakers are expensive for a reason. The bass & overall sound on it is phenomenal. You don't even need to crank it all the way up to be able to hear it from across the house, but then again my house is pretty empty. The battery life is wonderful. I can play it for hours & hours before it's ready to charge again & even when it does need charging it makes a clear sound to warn you rather than just shuttinf off completely. Connecting to my phone is super easy.

### ⭐⭐⭐⭐⭐ My Mind Has Been Blown!
*by A***R on December 12, 2025*

I was expecting something good, but I'm blown away! These speakers sound good enough to use full time in a small to medium size room. I wanted a good portable stereo system that I can set up on the go, and also use in my motorhome for music and theater sound (the Bose soundbar in the RV is just okay, but not immersive in the least). These speakers far surpassed my expectations, even compared to decent wired speakers. The fact that they are battery powered, while also being crammed full of audiophile-level engineering, has my mind boggled! How did they do that? Major kudos to the engineers at Harmon Kardon!

### ⭐⭐⭐⭐⭐ Wow! great sound.
*by C***R on December 16, 2025*

Wow! This speaker has great sound. I never expected it to be as good as it is. Crisp. Balanced. Powerful. It’s a very nice looking speaker too. So worth the price.

## Frequently Bought Together

- Harman Kardon Onyx Studio 9 - Portable Stereo Bluetooth Home Speaker with Built-in Battery and USB Charging, self-Tuning, and Multi-Speaker Connection by Auracast - Black
- LTGEM Case Compatible with Harman Kardon Onyx Studio 9 Speaker, Black

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-27*