JBL Go 4 Review (2026): Tiny, Tough, but Bass-Shy?

This JBL Go 4 review looks at a pocket-sized portable speaker, and at whether its mix of toughness and portability is enough to justify a place in your bag. It is aimed at travellers and casual listeners who want something rugged and easy to carry, and who care less about room-filling volume or deep bass. It sits in the mid-range part of the market. This review is based on manufacturer specs and what independent experts report, not on our own hands-on testing.

What the JBL Go 4 is, and why people consider it

The Go 4 is a compact Bluetooth speaker built around the idea that it should go anywhere. JBL pitches it with "JBL Pro Sound" and punchier bass, and it adds a few modern touches: Auracast support, multi-point Bluetooth, and a companion app with EQ presets. It is also made partly from recycled plastic and fabric.

The appeal is simple. You get a speaker that weighs 0.19 kg, clips onto a bag through an integrated carry loop, and carries an IP67 rating for water and dust. That makes it a natural fit for beach days, hikes, holidays and desk use, where a bigger speaker would be a nuisance. Expert reviewers largely agree, with an average of 8.4/10 across 5 expert reviews. What Hi-Fi? gives it 5/5, MakeUseOf 9/10, TechRadar 4/5, SoundGuys 7.9/10 and How-To Geek 7/10. The scores run from 7/10 (How-To Geek) to a perfect 5/5 (What Hi-Fi?), and the reviewers' common criticisms are covered below.

JBL Go 4 review: design and build

The design priority is portability. At 0.19 kg and 94.3 x 75.7 x 42.2 mm / 3.7 x 3.0 x 1.7", it is a speaker you can carry without thinking about it. The integrated carry loop is the practical detail that matters most day to day. It lets you attach the speaker to a bag, so it travels with you instead of sitting at the bottom of it.

The IP67 rating is the other headline. In general terms, IP67 means the speaker is sealed against dust and can handle immersion in water, so splashes, rain and pool or beach use are the situations it is built for. For a speaker meant to live outdoors and in bags, that durability does as much for its appeal as the sound does. Reviewers call out both the size and the IP67 protection as clear strengths.

The use of recycled plastic and fabric in part of the construction is a small bonus for buyers who pay attention to materials. The published specs do not say how much of it is recycled, so treat it as a general point rather than a measured claim.

Features and what they mean day to day

Sound tuning and the app

The Go 4 uses a 45 mm / 1.75" transducer with 4.2 W RMS of output power and a frequency response of 90 Hz – 20 kHz. Those figures describe a small speaker designed to be clear rather than powerful, and the 90 Hz low limit explains why the deepest bass is not its strength. JBL promotes punchier bass, but reviewers still describe the low end as thin.

The JBL Portable app adds EQ presets, so you can adjust the balance if the default sound is not to your taste. That is useful for a speaker this small, where a little tweaking can go a long way. One caveat: using Playtime Boost or Auracast can limit sound quality or EQ control, so the app is not always a full fix.

Stereo pairing and Auracast

Two Go 4 speakers can be paired for stereo, which adds flexibility. Auracast support also lets you link multiple speakers together. For anyone who wants to scale up from a single speaker to a small group of them, that is a flexible approach, though the same caveat applies about trade-offs when Auracast is active.

Connectivity

Bluetooth 5.3 is on board, along with the A2DP V1.4 and AVRCP V1.6 profiles, which cover streaming audio and basic playback control. Multi-point Bluetooth lets the speaker stay connected to more than one source, which is handy if you switch between a phone and a laptop. Charging is by USB Type-C, so it uses the same cable as most current devices.

One notable omission: there is no built-in microphone. If you want to take calls on speakerphone, this is not the speaker for it.

Battery and everyday performance

JBL rates the Go 4 at up to 7 hours of playtime, with up to 2 more hours using Playtime Boost. The battery is a Li-ion polymer cell rated at 3.23 Wh (3.8 V / 850 mAh), and a full charge takes 3 hours (5 V 1 A). Reviewers call the battery life modest, and some testers fell short of the rated 7 hours.

It is worth treating the figure as a best case. A common criticism is that battery life is modest, and some testers fell short of 7 hours. Playtime Boost extends runtime but can limit sound quality, so you are trading quality for minutes. If you know you will be away from power for a long time, plan around that.

The signal-to-noise ratio is listed as > 85 dB, and reviewers describe the sound as clear for a speaker of this size.

What experts like and what they criticise

Praise. Reviewers consistently praise:

• the pocket-sized form and carry loop
• the IP67 protection
• a clear, forward sound that rates well for its size
• the flexibility of the app's EQ presets
• the stereo pairing and Auracast options

What Hi-Fi?'s 5/5 and MakeUseOf's 9/10 reflect how well the package works as a small, tough, easy-to-use speaker.

Criticism. A common criticism is the thin low end. Despite the punchier tuning, deep bass is limited. Battery life is modest, and some testers did not reach the rated 7 hours. The lack of a microphone rules out speakerphone use. Finally, Playtime Boost and Auracast can limit sound quality or EQ control, so the headline features do not always come for free.

Who should buy the JBL Go 4, and who should skip it

Buy it if you want a rugged, ultra-portable speaker for travel, the beach or a bag clip. It suits people who value clean, clear sound over weight and who like the idea of pairing two speakers later. It also suits anyone who wants a simple USB-C-charged speaker that can survive water and dust.

Skip it if deep bass is a priority, if you need a battery that lasts well beyond a day, or if you want to take calls through the speaker. In those cases, a larger speaker or a different type of device will serve you better. If you mostly listen alone while on the move, our guide to the best wireless earbuds may also be worth a look.

How it fits in its category

Portable Bluetooth speakers generally trade size against bass and battery life, and the Go 4 sits firmly at the small, portable end of that spectrum. Its strengths are durability, portability and flexibility, rather than power.

Verdict

The JBL Go 4 does what a small, tough speaker should. It is easy to carry, protected against water and dust, and clear-sounding for its size, with extras like EQ presets, stereo pairing and Auracast that add real flexibility. Its limits are just as clear: thin bass, modest battery life and no microphone. If those fit how you listen, it is an easy speaker to like. If you want more weight in the sound or more time between charges, look elsewhere.

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