# Stereo portable speaker Harman/Kardon Onyx Studio 9 — 3.0 channels, 50 W, 12 cm woofer, USB-C, wireless, Black/Grey

**URL:** https://aio.lv/en/product--harman-kardon-hkos9blkep--12247177
**Data updated:** 2026-04-06 09:54 (EEST)
**Category:** Portable Speakers
**Manufacturer:** Harman-Kardon
**Manufacturer code:** HKOS9BLKEP
**EAN:** 1200130014116
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 264.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 218.59 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--harman-kardon-hkos9blkep--12247177

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Harman/Kardon Onyx Studio 9 is a round stereo portable speaker with 3.0 audio channels and 50 W RMS output. It features a 12 cm woofer and 2 cm tweeter, frequency range 50–20,000 Hz and SNR 80 dB. Connectivity includes wireless and USB Type‑C; a 2 m power cord is supplied. Suited for home and portable universal audio playback of MP3 and other formats.

## Long description

The Harman/Kardon Onyx Studio 9 is a round stereo portable speaker with a 50 W RMS output in black and grey. It features a 12 cm woofer and a 2 cm tweeter, supporting a frequency response from 50 Hz to 20 kHz and a signal-to-noise ratio of 80 dB. The speaker offers wireless Bluetooth connectivity, a USB Type-C port, and a 2 m cord for charging. Its lithium-ion battery (approximately 4722 mAh / 17.15 Wh) provides around 8 hours of playback. The design is compact and intended for universal audio use.
Advantages
The Onyx Studio 9 combines a 50 W RMS output with a balanced woofer and tweeter configuration to deliver clear mid and high frequencies and robust low end for its size. Wireless Bluetooth and USB Type-C connectivity make it simple to pair devices and recharge the battery. The round, portable design and multi-hour battery life support mobile use in different environments.
Suitable for
Listening to music at home or outdoors
Portable audio for small gatherings
Streaming MP3 and other common audio formats from Bluetooth devices
When it may not be suitable
This speaker is designed for portable and home use and may not meet the power or coverage requirements of large venues or professional sound reinforcement. Users seeking very long continuous playback beyond the listed battery life or advanced audiophile features such as lossless wired inputs or studio-grade monitoring may find it limiting.
Key specifications
Output power: 50 W (RMS)
Frequency range: 50 Hz – 20 kHz
Signal-to-noise ratio: 80 dB
Drivers: 12 cm woofer and 2 cm tweeter
Connectivity: Wireless Bluetooth, USB Type-C
Battery: Lithium-Ion, ~4722 mAh / 17.15 Wh, up to 8 hours playback
Cable length (charger): 2 m
Colour: Black, Grey
Design: Round, portable stereo speaker
How to use
Charge the speaker via the supplied USB Type-C cable before first use. Pair a Bluetooth device by enabling Bluetooth on your source device and selecting the Onyx Studio 9 from the device list. Adjust volume and playback from the connected device or speaker controls as available. For wired charging, connect the USB Type-C cable to a compatible power adapter. Observe the indicated battery runtime and recharge when battery level is low.
What to consider before purchase
Intended use: portable/home listening versus large venue sound
Battery runtime versus your typical playback duration
Need for wired inputs or advanced audiophile features
Preferred connectivity options (Bluetooth, USB-C)
Usage recommendations
Place the speaker on a stable surface away from obstructions for best sound dispersion, keep the firmware updated if updates are available, and charge the battery fully before extended use to maximize playback time.

## Specifications

### Technical details

| Feature | Value |
|---|---|
| AC adapter included | No |
| Equalizer | Yes |
| Subwoofer RMS power | 0 W |
| Bluetooth | Yes |
| AirPlay | No |
| USB connectivity | Yes |
| Warranty period | 2 year(s) |

### Design

| Feature | Value |
|---|---|
| Product colour | Black, Grey |
| Product design | Round |
| Built-in display | No |
| Product type | Stereo portable speaker |

### Performance

| Feature | Value |
|---|---|
| Built-in microphone | No |
| FM radio | No |
| Audio formats supported | MP3 |
| Hands-free mode | No |
| Card reader integrated | No |
| Recommended usage | Universal |
| Amplifier | No |

### Power

| Feature | Value |
|---|---|
| Battery recharge time | 4 h |
| Battery life (max) | 8 h |
| Power source type | AC, Battery |
| DC input voltage | 5 |
| USB Type-C charging port | Yes |

### Packaging content

| Feature | Value |
|---|---|
| Cables included | AC |
| Quick start guide | Yes |
| Warranty card | Yes |

### Loudspeakers

| Feature | Value |
|---|---|
| Audio output channels | 3.0 |
| Woofer diameter | 120 mm |
| Tweeter | Yes |
| Tweeter diameter | 20 mm |
| Woofer | Yes |
| Subwoofer driver diameter | 0 mm |
| Number of drivers | 4 |
| Number of woofer drivers | 1 |
| Number of tweeter drivers | 3 |
| Number of speakers | 1 |

### Ports & interfaces

| Feature | Value |
|---|---|
| Connectivity technology | Wireless |
| USB connector type | USB Type-C |
| AUX in | Yes |
| Cord length | 2 m |

### Features

| Feature | Value |
|---|---|
| Bluetooth version | 5.3 |
| Signal-to-Noise Ratio (SNR) | 80 dB |
| Wi-Fi | No |
| Housing material | Aluminium, Fabric |

### Battery

| Feature | Value |
|---|---|
| Battery technology | Lithium-Ion (Li-Ion) |
| Battery capacity | 4722 mAh |
| Battery voltage | 3.63 V |
| Battery capacity | 17.15 Wh |

### Audio

| Feature | Value |
|---|---|
| RMS rated power | 50 W |
| Frequency range | 50 - 20000 |

### Other features

| Feature | Value |
|---|---|
| AC input frequency | 50/60 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 3.36 kg |
| Height | 287.5 mm |
| Width | 289.2 mm |
| Depth | 130 mm |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 4200 g |
| Package depth | 172 mm |
| Package height | 322 mm |
| Package width | 312 mm |

### Logistics data

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |

## FAQ

### How much does the Harman/Kardon Onyx Studio 9 stereo portable speaker cost, and is it available for purchase?

The price is 264.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 14.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Harman/Kardon Onyx Studio 9 stereo portable speaker be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Harman-Kardon products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Harman-Kardon service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, number of speakers, product colour, power source type, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Harman/Kardon Onyx Studio 9 stereo portable speaker?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/12247177/68164648_large.webp