Harman Kardon Onyx Studio 8

Name: Harman Kardon Onyx Studio 8
Brand: Harman Kardon
SKU: 8966

Manufacturer: Harman Kardon

The Harman Kardon Onyx Studio 8 is a sizeable portable speaker designed for home and on-the-go listening, offering a wireless experience through Bluetooth 5.2 connectivity. With a total of three drivers and a built-in subwoofer, it covers a frequency range from 50 Hz up to 20,000 Hz, delivering a broad sonic profile. The speaker includes 50W of audio output power, making it one of the more capable options in the portable speaker category in terms of raw wattage.

Weighing 3,520 g and measuring 302.5 mm tall, the Onyx Studio 8 is a substantial unit with a volume of roughly 12,930 cm³. It runs on a 3,250 mAh rechargeable battery rated for 8 hours of playback, with a charge time of approximately 5 hours. The speaker supports stereo pairing with a second compatible unit, includes a detachable cable, and features a battery level indicator along with a sleep timer. Voice prompts are also present to assist with device status feedback, and smartphone remote control is supported through a companion app.

Pros

Includes a built-in subwoofer alongside three drivers, covering a frequency range from 50 Hz to 20,000 Hz
Delivers 50W of audio output power through a single channel, which is substantial for a portable speaker
Supports stereo pairing with a second compatible unit for a wider soundstage
Smartphone remote control is supported, allowing playback management without touching the speaker
Features a sleep timer and voice prompts for added day-to-day convenience
Comes with a detachable cable, making replacement or storage more practical

Cons

Offers no water resistance, limiting its suitability for outdoor or wet environments
Weighs 3,520 g and has a large physical volume, making it less convenient to carry around
Battery life is rated at only 8 hours, with a relatively long charge time of 5 hours
No advanced Bluetooth audio codecs are supported, including aptX, LDAC, AAC, and their variants
Does not support Wi-Fi, AirPlay, Chromecast, or any network-based streaming
No AUX input or 3.5 mm audio jack is available, restricting wired connection options

Who is this for?

The Onyx Studio 8 suits users who want a high-output home listening experience, with its 50W of audio power, built-in subwoofer, and three-driver configuration making it well-suited for filling a room with sound. Its stereo pairing support appeals to those who want to expand their setup with a second unit, while the smartphone remote control and sleep timer add practical convenience for everyday home use. Users who prioritize wired-free Bluetooth connectivity and are comfortable within a 10 m range will find the setup straightforward and functional.

Who is this NOT for?

This speaker is a poor fit for users who need portability or ruggedness, as its 3,520 g weight, large dimensions, and complete lack of water resistance make it impractical for outdoor activities, travel, or use in wet environments. Listeners who rely on advanced audio codecs such as LDAC, aptX, or AAC for high-fidelity wireless audio will find the connectivity options limiting, as none of these are supported. The 8-hour battery life paired with a 5-hour charge time also makes it a poor choice for users who need extended untethered playback throughout the day.

Design:

volume	12930.665 cm³
drivers count	3
control panel placed on a device	✓
water resistance	None
travel bag is included	✕
has a touch screen	✕
has RGB lighting	✕
has a detachable cable	✓
is a neckband speaker	✕
has a remote control	✕
weight	3520 g
height	302.5 mm
width	268 mm
thickness	159.5 mm

The Harman Kardon Onyx Studio 8 has a notably substantial physical presence, standing 302.5 mm tall, 268 mm wide, and 159.5 mm thick, with a total volume of roughly 12,930 cm³ and a weight of 3,520 g. It houses three drivers and includes a control panel directly on the device, along with a detachable cable for added convenience. The speaker does not offer water resistance, RGB lighting, a touch screen, or a remote control, and no travel bag is included in the box.

Sound quality:

has a subwoofer	✓
highest frequency	20000 Hz
lowest frequency	50 Hz
audio output power	1 x 50W
sound pressure level	80 dB/mW
has a magnetic shielding	✕

The Onyx Studio 8 includes a built-in subwoofer and covers a frequency range spanning from 50 Hz to 20,000 Hz, giving it a reasonably wide sonic reach. It delivers 50W of audio output power through a single channel, with a sound pressure level rated at 80 dB/mW. Magnetic shielding is not present on this model.

Power:

battery power	3250 mAh
Battery life	8 hours
charge time	5 hours
has a battery level indicator	✓
has a rechargeable battery	✓
has a removable battery	✕
has wireless charging	✕

The Onyx Studio 8 is powered by a built-in rechargeable battery with a capacity of 3,250 mAh, rated for up to 8 hours of playback on a full charge, which takes approximately 5 hours to complete. A battery level indicator is included to help users track remaining charge. The battery is not removable, and wireless charging is not supported.

Connectivity:

Bluetooth version	5.2
supports Bluetooth pairing using NFC	✕
has a socket for a 3.5 mm audio jack	✕
has an AUX input	✕
has aptX Lossless	✕
has LDAC	✕
has aptX Adaptive	✕
has aptX HD	✕
has aptX	✕
has aptX Low Latency	✕
has AAC	✕
has AirPlay	✕
has Chromecast built-in	✕
has Auracast	✕
has Bluetooth LE Audio	✕
maximum Bluetooth range	10 m
supports Wi-Fi	✕
has a 3.5mm male connector	✕
has an external memory slot	✕
is DLNA-certified	✕
supports Ethernet	✕
has a microphone input	✕

The Onyx Studio 8 connects exclusively via Bluetooth 5.2, with a maximum wireless range of 10 m. It does not support NFC pairing, Wi-Fi, AirPlay, Chromecast, DLNA, or Ethernet, making Bluetooth the sole wireless connection method. On the audio codec side, none of the advanced options are available — aptX, aptX HD, aptX Adaptive, aptX Lossless, aptX Low Latency, LDAC, AAC, Auracast, and Bluetooth LE Audio are all absent. There is no 3.5 mm audio jack socket, no AUX input, no 3.5 mm male connector, no external memory slot, and no microphone input.

Features:

Can be used wirelessly	✓
supports a remote smartphone	✓
has fast pairing	✕
has voice commands	✕
Has a radio	✕
Has voice prompts	✓
has a mute function	✕
works as a power bank	✕
has a sleep timer	✓

The Onyx Studio 8 can be used wirelessly and supports smartphone remote control, allowing users to manage playback from their phone. It includes voice prompts for device status feedback and a sleep timer for scheduled shutoff. Fast pairing, voice commands, a mute function, radio, and power bank functionality are not available on this model.

Miscellaneous:

supports pairing for stereo sound	✓

The Onyx Studio 8 supports stereo pairing, allowing it to be linked with a second compatible unit to create a two-speaker stereo setup.

Final Verdict

The Harman Kardon Onyx Studio 8 is a room-oriented portable speaker that prioritizes audio output over portability, built around a three-driver configuration with a subwoofer and 50W of single-channel power that gives it a strong presence in home listening environments. Its Bluetooth 5.2 connectivity, stereo pairing support, and smartphone remote control make it a capable and convenient option for stationary use, though its considerable weight, limited battery endurance, and absence of advanced audio codecs or wired inputs will constrain its appeal for users with more demanding or mobile requirements. For those whose primary need is a powerful, wirelessly driven speaker for indoor use, the Onyx Studio 8 delivers a focused and well-defined proposition.