JBL Go 4 Mono portable speaker Black 4.2 W

Mono Portable Speaker JBL Go 4 Black is a compact mono portable speaker from JBL that provides a rated RMS power of 4.2 W and a frequency range of 90–20000 Hz. The speaker supports wireless audio streaming via Bluetooth with A2DP and AVRCP profiles and is powered by a built-in 850 mAh lithium‑ion battery. The unit weighs 0.19 kg, has one speaker element, simple volume control buttons and a black finish designed for everyday mobile use.

Advantages

The JBL Go 4 Black combines a small physical footprint with a clearly specified audio range and a modest RMS output suitable for personal listening. Bluetooth connectivity using A2DP and AVRCP profiles ensures compatibility with most smartphones, tablets and laptops for direct streaming. The integrated 850 mAh lithium‑ion battery provides extended portable use without external power, while the single‑speaker mono design and straightforward controls simplify operation.

Suitable for

• Personal listening while travelling
• Short outdoor or indoor gatherings where compact sound is needed
• Streaming audio from smartphones, tablets and laptops
• Use as a compact desktop or bedside speaker

Key specifications

• Brand: JBL; Model: Go 4; MPN: JBLGO4BLK; EAN: 1200130009433
• Type: Mono portable speaker
• Rated RMS power: 4.2 W
• Frequency range: 90 – 20000 Hz
• Wireless: Bluetooth (A2DP, AVRCP)
• Battery: built-in lithium‑ion, 850 mAh
• Number of speakers: 1
• Weight: 0.19 kg
• Colour: Black

How to use

Turn the speaker on using the power control, enable Bluetooth on your source device and select "JBL Go 4" from the device list to pair. Use the volume control buttons on the speaker to adjust playback level. Before first use, fully charge the built‑in battery; while in use, monitor battery level on your source device if supported. Power off the speaker when not in use to conserve battery.

Recommendations

Place the speaker on a flat, stable surface for best sound dispersion. Keep the device within a typical Bluetooth range of your source device and avoid obstructions that may interfere with the connection. To minimise distortion, avoid sustained maximum volume given the mono 4.2 W output and charge the battery regularly to maintain consistent performance.