JBL Boombox 4

The JBL Boombox 4 is unapologetically big. This is a speaker built to fill a backyard, a beach or a campsite with sound, and on that front it looks like it delivers. Reviewers agree it gets very loud and hits with real power. JBL has also refined the formula over the Boombox 3 with a redesigned driver layout, more wattage and a slightly lighter build.

The changes we find most interesting are the practical ones. The battery pack can be swapped or replaced, which should extend the speaker's useful life. Auracast support lets you stereo-pair two units or link up with other speakers for a party setup. USB audio gives you a wired, lossless option too, though there is no Aux input.

It's best suited to people who host outdoor gatherings and want volume, durability and flexibility over grab-and-go convenience. If you want something to toss in a backpack, look elsewhere. Even lighter than before, this is still a hefty carry-handle speaker.

On the evidence available, the Boombox 4 is a strong, thoughtful update. Raw output is its headline strength, and the IP68 rating should let it survive pool parties and dusty campsites without much worry. The replaceable battery is a genuinely welcome move in a category where a dead battery often means a dead speaker.

• Sound: Loud and powerful. With the default tuning, though, the mids are reported to be somewhat underserved. Vocal-heavy music may sound a touch recessed out of the box. The 7-band EQ should give you room to correct that.
• Connectivity: Bluetooth 5.4 and Auracast feel future-facing, and USB audio is a nice extra. Dropping the Aux input will frustrate anyone with older sources or a habit of plugging in a cable.
• Portability: Lighter than its predecessor, but size and weight still limit how far you'll want to carry it.
• Value: Sources describe it as premium-priced. We didn't have a confirmed price to weigh against the competition, so we can't judge value precisely.

A caveat: our assessment draws on a limited set of verified claims. We don't have data on battery life, charging or detailed frequency performance, all of which matter for a speaker like this. Within those limits, the Boombox 4 is easy to recommend for buyers who prioritise volume and durability and can live with its bulk, cost and missing Aux input.