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

**URL:** https://aio.lv/en/product--harman-hkos9blkep--11732086
**Data updated:** 2026-03-01 17:49 (EET)
**Category:** Portable Speakers
**Manufacturer:** HARMAN
**Manufacturer code:** HKOS9BLKEP
**EAN:** 1200130014116
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 172.99 €
**Prices and availability valid until:** 2026-08-08 23:59
**Price without VAT (21%):** 142.97 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--harman-hkos9blkep--11732086

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.07.2026 | free |
| Pickup points | 29.07.2026 | 1.89 EUR |
| Courier delivery to door | 29.07.2026 | 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. Wireless connectivity plus USB‑C input and 2 m power cord; supports MP3 playback. Designed for universal use at home or on the go.

## Long description

Harman/Kardon Onyx Studio 9 is a round stereo portable speaker offering 3.0 audio channels and a rated 50 W RMS output. The design incorporates a 12 cm woofer and a 2 cm tweeter to cover a stated frequency range from 50 to 20,000 Hz with a signal-to-noise ratio of 80 dB. The speaker supports wireless playback and wired connections via USB‑C and AUX, and it can operate from AC power or its built-in rechargeable battery. The unit comes in a black and grey finish and includes a 2 m power cord for stationary use.
Advantages
The Onyx Studio 9 combines a compact, circular enclosure with stereo 3.0 channel output to provide fuller sound than a single mono portable unit. Multiple connectivity options—Bluetooth, AUX, and USB‑C—allow flexible source selection for mobile phones, laptops and MP3 players. A rechargeable Li‑Ion battery provides portable operation when AC power is unavailable, while the included power cord supports uninterrupted indoor use. The speaker’s specifications such as woofer size, tweeter dimension and frequency range are intended to deliver balanced low, mid and high frequencies for everyday listening.
Suitable for
 Listening to music at home in medium-sized rooms
 Portable audio for small gatherings or outdoor use
 Playback from phones, tablets or MP3 players via Bluetooth, AUX or USB‑C
 Use as a desktop or bedside speaker with AC power connection
Key specifications
 Channels: 3.0 stereo configuration
 Rated output: 50 W RMS
 Woofer diameter: 12 cm
 Tweeter diameter: 2 cm
 Frequency response: 50–20,000 Hz
 Signal-to-noise ratio: 80 dB
 Connectivity: Bluetooth, AUX in, USB‑C input
 Power sources: AC and rechargeable battery
 Battery: Lithium‑Ion, 17.15 Wh (approx. 4722 mAh) with up to 8 h runtime (manufacturer rating)
 Weight: 3.36 kg
 Product colour: Black and Grey
 Included accessory: 2 m power cord
How to use
Place the Harman/Kardon Onyx Studio 9 on a stable surface away from direct moisture and excessive heat. For portable use, ensure the battery is charged via the USB‑C input or AC adapter before disconnecting from mains. Select the desired input source: enable Bluetooth pairing on your playback device and select the speaker, or connect via AUX or USB‑C for wired playback. Adjust the volume from the source device or speaker controls to a comfortable level. When using the speaker for extended periods on AC power, connect the 2 m power cord to maintain continuous operation.
Usage recommendations
For best sound balance, position the speaker so its front faces the listening area and allow several centimeters of clearance around the enclosure. Use Bluetooth for convenience and USB‑C or AUX when constant connection stability and lower latency are required. To preserve battery life, store the device partly charged if unused for long periods and avoid full discharge before recharging.

## 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 portable stereo speaker cost, and is it available for purchase?

The price is 172.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 50 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 24.07.2026 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 portable stereo 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 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 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 portable stereo 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/11732086/67173717_large.webp