JBL Tune Flex Review: Sealed or Open, Your Choice

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The Short Version

Buy it if you have never settled whether you like a sealed fit or an open one. This is the cheap way to find out, because the box contains both answers.

Buy it if you want cancellation without committing to a seal. The open tips give up some isolation and let you keep the ambient awareness a seal removes.

Don't buy it expecting flagship cancellation. At this price it dulls steady noise and does the ordinary amount about voices, which is to say very little.

Two Tip Types Is the Whole Story

Sealed silicone tips in multiple sizes, and open tips, both included.

This sounds like a minor accessory decision and it changes what the earbud actually is. A sealed tip pressurises the canal, which is where cancellation and bass both come from — more isolation, more low end, and the classic complaint of pressure building on a long flight or a long run. An open tip skips the seal, trading some of both for comfort and for hearing your surroundings.

Most earbuds pick one and commit. JBL's decision to ship both means you are not guessing from a spec sheet or a review which one you'll prefer — you try each for a day and keep whichever wins. For anyone who has ever bought a sealed pair and found them uncomfortable after twenty minutes, or bought an open pair and wished for a bit more bass, this solves the actual problem rather than asking you to choose blind.

Active Noise Cancelling, With the Sealed Tips

Two microphones, plus a Smart Ambient / Ambient Aware mode that lets outside sound back in on demand.

With the sealed tips in, this behaves like ordinary budget ANC: steady engine drone and air conditioning drop noticeably, voices barely change, and the effect stops well short of what a flagship over-ear does. That is the expected outcome at this price, not a defect specific to this earbud.

With the open tips in, cancellation is a different proposition. There is no seal to work with, so the active cancellation is fighting a leakier system — treat the ANC spec as describing the sealed configuration, because that is the one it was measured for.

Ambient Aware is the more useful feature for the sealed setup specifically, since it is the only way to hear a barista or a gate announcement without pulling an earbud out — a problem the open tips don't have in the first place.

Calls

Four microphones and a feature JBL calls VoiceAware, which lets you dial in how much of your own voice you hear in the earbud.

That second part solves a real annoyance: sealed earbuds often make your own voice sound muffled and loud in your own head, which pushes people to talk louder than they need to. Letting you tune that back down is a genuinely practical feature rather than a marketing checkbox.

Battery

Eight hours in the earbuds with ANC on, 24 more in the case — 32 hours total. Without ANC, JBL's figures run higher.

Thirty-two hours covers a work week of moderate use without touching the case more than once or twice. The case also does a real job in an emergency: JBL quotes ten minutes of charging for two hours of playtime, which is enough to save a commute you almost missed with a dead battery.

As with every manufacturer figure, treat this as a ceiling. Real use at real volume runs shorter.

Water Resistance

IPX4, which covers sweat and light rain rather than a downpour or a swim. Fine for a gym session or a run in drizzle; not the spec to check if you want to submerge them. For that, our best sports headphones guide covers the pairs actually rated for it.

The Two Colourways, and a Newer Generation

Black and Blue sell identically at $59.95, both from Amazon directly, both New. If the colour doesn't matter to you, either is the same purchase.

A JBL Tune Flex 2 also exists, currently around $70–73. It is too new for this site to review responsibly — its listings carry a single review each at the time of writing, nowhere near enough to say anything evidence-based about reliability or real-world performance. If the sealed-or-open idea appeals to you today, the original Tune Flex is the one with fourteen thousand owners behind it; the 2 is worth revisiting once it has a real track record.

What You Give Up

Flagship sound and cancellation. This is a fifty-dollar budget earbud with a genuinely clever accessory decision, not a Sony or Bose competitor.

A single obvious fit. The flexibility that is the whole point of this earbud is also work: you do have to try both tip types to find out which suits you, rather than being told.

Splash resistance beyond IPX4. Sweat and rain, not immersion.

FAQ

Is the JBL Tune Flex worth buying in 2026? Yes, specifically if you are unsure whether you prefer sealed or open earbuds — it is the cheapest way we know of to try both without buying two products.

What is the difference between the sealed and open tips? Sealed tips press into the canal and boost bass and isolation at the cost of comfort over long wear. Open tips skip the seal, trading some bass and isolation for comfort and awareness of your surroundings.

How good is the noise cancelling? Ordinary for the price with the sealed tips: it dulls steady noise like engines and fans, and does little about voices, as with every earbud at this cost. It is meaningfully weaker with the open tips, since there is no seal to work with.

How long does the battery last? JBL quotes 8 hours per charge with ANC on and 24 more from the case, for 32 hours total. A 10-minute charge adds about 2 hours.

Can I use it in the rain? IPX4 covers sweat and light rain. It is not rated for submersion or heavy rain.

Should I buy the Tune Flex or the Tune Flex 2? The original, for now. The 2 has almost no reviews at the time of writing, so there is nothing to judge it on yet. The original has fourteen thousand.

Black or Blue — does it matter? No. Both colourways sell at the same price from the same seller.

The Verdict

Our score: 8.2/10. The JBL Tune Flex earns its place not on cancellation strength or sound quality — both are ordinary for fifty dollars — but on a single decision most manufacturers don't bother making: shipping both sealed and open tips so you can find out which fit you actually prefer instead of guessing from a listing.

If you already know you want a sealed earbud with strong cancellation, better options exist above this price. If you have never settled the sealed-versus-open question, or want cancellation without fully committing to a seal, this is the cheapest honest way to answer it — and our best noise cancelling earbuds page shows where it sits against the field.