JBL Go 4 Review: Battery Life, Sound & Waterproof Test

If you’ve been watching the JBL Go lineup evolve over the past few years, the improvements from the Go 2 to the Go 4 are harder to ignore than they might seem at first glance. The jumps between generations are modest on paper, but in practice they add up to a speaker that finally feels like it belongs in the conversation with real portable audio contenders. Whether you’re upgrading from an older model or trying to decide between generations, the details below should help you figure out which one actually fits your life.

Battery Life: Up to 7 hours ·
Waterproof Rating: IP67 ·
Output Power: 4.2 Watts ·
Sound Profile: JBL Pro Sound with punchy bass ·
Portability: Fits in palm of hand

Is the JBL Go 4 any good?

Short answer: yes, for what it is. The JBL Go 4 is a tiny speaker that punches above its weight in ways that matter for real-world use. Independent reviews consistently praise its sound, durability, and the addition of app support that its predecessors lack.

Sound quality and performance

The Go 4 delivers what JBL calls “Pro Sound,” and for a speaker this size, the description holds up. What Hi-Fi? describes it as “forward, cohesive sound” that fulfills its brief excellently. The low-frequency response reaches down to 90 Hz, a meaningful improvement over the Go 3’s 110 Hz and a significant jump from the Go 2’s 180 Hz floor.

YouTube audio tests at maximum volume show the Go 4 sounding louder and clearer than the Go 3, which itself was no slouch. The 1.75-inch driver is the same size as the Go 3, but the EQ customization available through the JBL Portable app makes a tangible difference. SoundGuys notes that Go 4 sounds better than Go 3 specifically because of this customization capability.

Build and portability

The Go 4 swaps the Go 3’s fabric finish for a rubberized silicone body, which SoundGuys notes provides better durability. It weighs less than 0.5 pounds and fits in the palm of your hand. All models can operate while charging, a practical detail for longer sessions.

The implication: the Go 4’s build quality is a meaningful step up from both predecessors, particularly for users who need a speaker that can handle real-world abuse.

Battery life in real use

Battery life is where the Go 4 earns its upgrade badge. Seven hours is the official figure, with the Playtime Boost feature adding up to two more hours at the cost of slightly adjusted EQ. Go 3 and Go 2 both sit at five hours.

Charging time improved from 3.5 hours (Go 3) to 3 hours on the Go 4. The 850 mAh battery capacity in the Go 4 exceeds the Go 3’s 750 mAh and the Go 2’s 730 mAh.

What this means: if you use your speaker for extended sessions, the Go 4’s battery advantage is substantial — nearly 40% more runtime between charges.

Can you use JBL Go 4 in a shower?

Yes — and with more confidence than with older models. The IP67 rating on the Go 4 means complete dust protection and survival in up to 1 meter of water for 30 minutes.

Waterproof rating details

IP67 breaks down simply: the “6” means total dust protection, and the “7” means the device can handle being submerged in water up to 1 meter deep for half an hour. This isn’t just splash resistance — the Go 4 can genuinely take a dunk and keep playing.

The pattern: both Go 4 and Go 3 share IP67, giving them equal water protection. The Go 2’s IPX7 rating means water resistance but no dust protection — the “X” is a placeholder, not a plus.

Dustproof capabilities

This is where the Go 4 and Go 3 have a clear edge over the Go 2. The Go 2 carries an IPX7 rating, which means water protection but no official dust protection. “X” in an IP rating is not a plus — it’s a placeholder indicating the device wasn’t tested for dust ingress.

The catch: for shower use specifically, dust protection isn’t just about beach or outdoor environments. Bathroom moisture and particulate exposure can affect speakers without sealed chassis designs.

Real-world shower tests

YouTube reviewers have put the Go 4 through steam and water exposure scenarios. The rubberized silicone build helps protect the speaker grille and ports from moisture intrusion better than fabric finishes.

What’s better, the JBL Go 3 or 4?

The Go 4 wins on features, but whether those features justify the price difference depends on how you use your speaker.

Sound improvements

SoundGuys recommends the Go 4 over the Go 3 specifically for its EQ customization and app support. RTINGS notes the Go 4 is better overall than the Go 3, citing longer battery life and the app as key differentiators. The low-frequency response improvement from 110 Hz to 90 Hz means noticeably deeper bass on bass-heavy tracks.

Battery and durability

Go 4 gives you 7 hours versus 5 hours on the Go 3, plus the option to stretch that to 9 with Playtime Boost. The rubberized silicone build on the Go 4 also edges out the Go 3’s fabric jacket in durability. Both share IP67, so no difference in water and dust protection.

Price value

“Companion app support alone makes this fresh design a worthy successor to the Go 3.”

— SoundGuys (Product Review)

Which is better, JBL Go 2 or 4?

This isn’t a close race. The Go 4 outperforms the Go 2 in nearly every measurable category.

Key upgrades from Go 2

The upgrades are substantial when viewed as a package. IP67 versus IPX7 means dust protection and a sealed chassis. Bluetooth 5.3 versus an older specification means better range and connection stability. The output jumps from 3W to 4.2W. Battery capacity increases from 730 mAh to 850 mAh.

Bass and volume differences

The low-frequency response difference is dramatic: 90 Hz on the Go 4 versus 180 Hz on the Go 2. At higher volumes, Go 4 maintains clarity where the Go 2 starts to distort. The volume sensitivity advantage (85 dB vs 80 dB) compounds this difference in real-world use.

Design changes

The physical evolution mirrors the feature evolution. Go 2 is functional and basic. Go 3 added style with a fabric finish. Go 4 adds substance with rubberized durability, the integrated carrying loop, and the Auracast button for multi-speaker pairing.

“The Go 4 fulfils its brief excellently, serving up a forward, cohesive sound.”

— What Hi-Fi? (Product Review)

The implication: if you’re still on a Go 2 in 2025, the Go 4 represents a generational leap rather than an incremental refresh.

Does the JBL Go 4 have bass?

Yes, for its size class. The 90 Hz low-frequency response puts the Go 4 ahead of the Go 3 (110 Hz) and well ahead of the Go 2 (180 Hz) in bass reproduction.

Bass performance review

JBL markets this as “punchy bass,” and the description is fair for a speaker of this footprint. You won’t get sub-bass rumble — that’s physically impossible from a 1.75-inch driver in a chassis this small — but the Go 4 delivers satisfying low-end presence for acoustic tracks, hip-hop, and pop.

Sound test results

YouTube audio tests comparing Go 4 against Go 3 at max volume consistently show the Go 4 producing louder, cleaner output with better bass definition. What Hi-Fi?’s review praises the “forward, cohesive” character of the sound signature.

Comparison to competitors

In the ultra-portable category, the Go 4 holds its own. The combination of 4.2W output, 90 Hz low-end, and app-based EQ tuning gives it more flexibility than most competitors in the $50 range. The IP67 rating is also a differentiator — many speakers at this price point offer splash resistance without full dust protection.

“The JBL Go 4 is better than the JBL Go 3, though they’re quite similar.”

— RTINGS (Product Testing)

JBL Go 4 vs Go 3 vs Go 2: The full comparison

Five key specifications separate these three generations more clearly than any marketing language could.

The pattern is clear: JBL refined the Go line incrementally but meaningfully. Go 3 solved the dust protection problem. Go 4 solved the battery anxiety and added the app control that power users had been requesting.

Related reading: Garmin Venu 3 Review

Frequently asked questions