How to choose a Bluetooth speaker

Four specifications decide whether you will be happy: physical cabinet size (which predicts real-world loudness and bass), the IP rating (which decides where it can go), realistic battery life at the volume you actually use, and whether it has a strap, clip or handle. Wattage, frequency-response range and Bluetooth version almost never change the outcome.

Portable speaker listings are optimized to be hard to compare. Wattage is quoted peak or continuous, per driver or per system, with no obligation to say which. Frequency response is published without the tolerance figure that would make it meaningful. Meanwhile the specifications that genuinely predict satisfaction are either unglamorous or not printed at all.

This guide is the framework we use on every roundup on this site. Work through the four that matter, ignore the three that do not, and the shortlist gets short quickly.

1. Cabinet size — the one that actually predicts loudness

Producing sound means moving air. Producing low frequencies means moving a lot of it. A bigger cabinet with a bigger driver moves more air, which is why physical size is the single best predictor of how a speaker performs outdoors — and it is a specification you can assess from a photograph, for free, without trusting any number.

The rule that follows: buy the smallest speaker that covers your loudest realistic use. Buying above it is the most common way people overspend in this category, and buying below it is the most common way they end up disappointed. Nothing else on the spec sheet rescues a cabinet that is too small for the space.

2. The IP rating — where it can go

Two characters after the IP. The first is dust, the second is water, and an X means that axis was never tested. So IPX7 is proven water protection with unknown dust protection; IP67 is the same water protection with dust sealing certified as well.

• IPX4-IPX5 — splashes and low-pressure jets. Fine for a shower, not for a pool.
• IPX7 — thirty minutes submerged at one meter. The category standard, and it costs almost nothing.
• IP67 — the same, plus certified dust-tight. What you want for a beach.
• IP68 — dust-tight plus deeper or longer immersion per the maker's stated conditions.
• Floating — not part of any rating. The manufacturer has to state it. Essential for a pool.

The value insight here: waterproofing has commoditized. IPX7 appears at every price on this site and does not improve as you spend more, so it is never a reason to move up a tier. Full detail in IPX7 and IP67 explained.

3. Battery life — at the volume you will actually use

Every quoted runtime in this industry is measured at roughly half volume with bass processing and any lighting switched off. That is a reasonable standardized test and a poor description of how anyone uses a speaker. Under realistic use, expect between a half and two-thirds of the quoted figure, and closer to a third at a party.

Two practical consequences. First, quoted hours are comparable between brands even though they are optimistic, so use them for ranking rather than planning. Second, battery life does not track price — the longest-running speaker on this site is a years-old budget model, and one of the shortest is a premium one. Never pay more expecting more runtime. More in battery life.

4. Something to attach it to

The least glamorous specification and one of the most predictive. A speaker with a strap, a carabiner or a handle goes places a speaker without one does not — onto a handlebar, a shower caddy, a boat rail, a tent pole. It also gets carried more, and a speaker left at home is worth nothing.

This is the specification we would not compromise on for any use that involves leaving the house. It is also cheap: a molded strap costs the manufacturer almost nothing and appears on speakers in the under-$50 tier.

The three that do not matter

None of these is a lie exactly. They are simply not comparable between manufacturers, which makes them useless for the only thing you want them for. Watts and loudness takes the first one apart in detail.

Putting it together

Illustrative

If you have no strong constraint

Soundcore Motion 300

Our default recommendation under $100 — stereo, slim, and honestly specified.

What it does well

Passes all four tests for the typical buyer: sensible cabinet size for a kitchen or patio, IPX7, thirteen honest hours, and a flat shape that packs well. Adds genuine stereo, which almost nothing at this price offers.

Where it cuts corners

No dust rating, does not float, and the slim cabinet caps bass extension. It is a general-purpose speaker rather than a specialist.

Who it is for

The default recommendation for most readers.

• Battery: 13 hours
• Water rating: IPX7 — submersible to 1 m for 30 minutes
• Output: 30 W stereo (two 15 W full-range drivers)

Check price on Amazon→Read the full Soundcore Motion 300 review

#ad — we earn a commission on qualifying purchases. How this is funded

Illustrative

If the budget is the constraint

Tribit StormBox Micro 2

The best-argued cheap speaker on the market, and now a last-generation bargain.

What it does well

IP67, twelve hours, and the best integrated mounting strap in the category, at a fraction of the price. Its passive radiator gets genuine low end out of a small cabinet.

Where it cuts corners

Ten watts is thin outdoors and it does not float. Now a previous-generation model, so stock is thinning.

Who it is for

Bikes, packs, small rooms and tight budgets.

• Battery: Up to 12 hours
• Water rating: IP67 — submersible to 1 m for 30 minutes, dustproof
• Output: 10 W
• Weight: 315 g

Check price on Amazon→Read the full Tribit StormBox Micro 2 review

#ad — we earn a commission on qualifying purchases. How this is funded

Illustrative

If it is for a party

Soundcore Boom 2

The value answer to a party speaker: it floats, it is loud, and it lasts a day.

What it does well

The cabinet size test points straight here for open-air use: a dedicated 50 W subwoofer and two tweeters, floating, with a carry strap. Real hardware rather than processing.

Where it cuts corners

Large, and its quoted battery assumes settings you will not use at a party. Finish is below JBL's.

Who it is for

Gardens, pools and tailgates.

• Battery: Up to 24 hours at 50% volume with BassUp and lights off
• Water rating: IPX7 — submersible to 1 m for 30 minutes, and it floats
• Output: Up to 80 W peak output (a 50 W subwoofer plus two 15 W tweeters)

Check price on Amazon→Read the full Soundcore Boom 2 review

#ad — we earn a commission on qualifying purchases. How this is funded

If you want a starting point rather than a framework, best for the money names one value pick at every tier, and the price hub explains what each tier genuinely buys.