Bar 300MK2

Released June 2025

JBL's 5.0-channel all-in-one soundbar has nine drivers, built-in bass ports and virtual Dolby Atmos. It offers automatic room calibration, HDMI eARC and Wi-Fi music streaming, without a separate subwoofer or rear speakers.

Type: Soundbar
Atmos: Yes
Connects by: Wi-Fi, Bluetooth and HDMI
Battery: –
Weight: 2.9 kg

Dolby Atmos

What reviewers say

Both find substantial bass and clear voices from a slim standalone bar. What Hi-Fi? hears convincing Atmos overhead effects for the price; Les Numériques finds height timid. What Hi-Fi? prefers films to music, whereas Les Numériques likes its musical balance. Both note bass limitations under demanding conditions, and Les Numériques finds bass reduced and distortion audible at high volume.

From whathifi.com and lesnumeriques.com

Specifications

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Sound

Type: Soundbar
Channels: 5.0
Dolby Atmos: Yes
Drivers: Five 42 × 80 mm racetrack drivers and four 20 mm tweeters; built-in bass ports, without external subwoofer, rear speakers or upward-firing drivers
Amplifiers: 450 W maximum output at 1% THD; 225 W RMS at 1% THD, separately specified by the maker
Frequency response: 50 Hz–20 kHz (−6 dB), maker specification
Audio formats: Dolby Atmos with virtual height effects and DTS Virtual:X; DTS Virtual:X was scheduled for a late-2025 software update and is listed in the current maker specifications
Room tuning: Automatic sound calibration, MultiBeam 3.0, PureVoice 2.0 dialogue enhancement and SmartDetails; seven-band EQ in JBL One. What Hi-Fi?'s December 2025 test reports no preset sound modes

Connections

Wi-Fi: Yes
Bluetooth: Yes
AirPlay: Yes
HDMI eARC: Yes
Voice assistants: None
Wi-Fi: Dual-band 2.4/5 GHz Wi-Fi 802.11 a/b/g/n/ac/ax
Bluetooth: Bluetooth 5.3; A2DP 1.3 and AVRCP 1.5
Ports: One HDMI input, one HDMI eARC output, optical input and USB-A service port. HDR10+ and Dolby Vision passthrough; What Hi-Fi? and Les Numériques report no 4K 120 Hz support. USB music playback is US-only
Streaming: AirPlay, Google Cast, Spotify Connect, Tidal Connect and Roon Ready; subscriptions may be required
Multi-room: AirPlay or Google Cast multiroom playback
App: JBL One for network setup, sound calibration, equaliser, music services, Moment presets and software updates

Design

Weight: 2.9 kg
Controls: Included remote, top-panel volume/source controls and front display; HDMI CEC and app controls. Works with external Google Assistant or Siri devices, without a built-in voice assistant
Microphones: Built-in microphone for sound calibration
Mounting: Two included wall-mount brackets and mounting template
Size: 940 × 50.5 × 104 mm (width × height × depth); main weight is the soundbar, while 4.8 kg is the packaged weight
Colours: Black; maker lists recycled plastic and aluminium in the construction
In the box: Soundbar, remote with two batteries, mains leads, HDMI cable, two wall-mount brackets, mounting template and product documentation; mains plugs vary by region

Pros and cons

Pros

All-in-one design without an external subwoofer
Automatic sound calibration and adjustable equaliser
AirPlay, Google Cast and HDMI eARC

Cons

Virtual height effects without upward-firing drivers
No optional subwoofer according to Les Numériques
No 4K 120 Hz passthrough

Closest rivals

Model	Type	Atmos	Connects by	Battery	Weight	Released
MarshallHeston 60	Soundbar	Yes	Wi-Fi, Bluetooth and HDMI	–	2.76 kg	2025
HisenseAX5140Q	Soundbar	Yes	Bluetooth and HDMI	–	2.7 kg	2025
SonyBRAVIA Theatre Bar 6	Soundbar	Yes	Bluetooth and HDMI	–	3.1 kg	2025

Sources

Photo: JBL — official press photograph; 596321-JBL BAR 300MK2 (1)-3fe345-original-1749116427.jpg; complete supplied canvas retained.

JBL Bar 300MK2 viewed from the front: JBL
JBL Bar 300MK2 rear ports and bass openings: JBL
JBL Bar 300MK2 viewed from the right: JBL
JBL Bar 300MK2 top controls and illuminated HDMI display: JBL
JBL Bar 300MK2 HDMI, optical and USB service connections: JBL

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