True wireless
Sealed buds in a pocket case, with hybrid ANC and two live connections.
True wireless audio · ANC · 40 h · IPX5
Engineered for people who actually listen.
Seven pairs — true wireless, neckband, clip-on and calls — all built around the driver rather than the case. Hybrid noise cancellation to 38 dB, forty hours of playtime with the charging case, IPX5 across the range, and free worldwide shipping on every order. Three Bluetooth speakers sit beside them, on the same battery rule.
- 40hours with the case
- 38dB peak ANC reduction
- IPX5sweat and rain rated
- 6mics per pair, four for ANC
What we make
Four ways to wear it, and three to put it down
The driver, the noise-cancelling algorithm and the 40-hour battery target are shared across everything we make. What changes is where the thing sits.
Neckband
Cord and necklace shapes that cannot be dropped down a drain, and hold a bigger cell.
Clip-on
Hooks that rest against the ear rather than sealing it. Nothing to work loose.
Calls & work
Single-ear headsets with mic arrays, sidetone and the charge level on the shell.
Bluetooth speakers
The second line. Same battery rule, IP67, and no noise cancelling because it would be pointless.
Spares & eartips
Single buds, replacement cases and all four tip sizes, for every product we have shipped.
The driver
Sound is decided at the driver, not at the case
Three driver platforms cover the whole range. Which one a model gets is decided by where it sits on your ear and how much air it has to move — not by what it costs.
01
12 mm dynamic
Everyday true wireless
- DiaphragmPU + Ti dome
- Impedance32 Ω
- Sensitivity105 dB/mW
- Response20 Hz – 20 kHz
- THD @ 1 kHz< 1 %
The workhorse. Titanium-coated dome for the top end, polyurethane surround for the bass it has to make in a sealed canal.
02
10 mm PEEK composite
Neckband and clip-on
- DiaphragmPEEK + PU
- Impedance16 Ω
- Sensitivity103 dB/mW
- Response20 Hz – 20 kHz
- THD @ 1 kHz< 1.2 %
Stiff, light and efficient — it has to be loud on very little current, because an open-ear driver never gets a seal to help it.
03
11 mm + armature
Meridian
- ConfigurationHybrid dual
- Crossover3.6 kHz
- Impedance24 Ω
- Sensitivity107 dB/mW
- THD @ 1 kHz< 0.8 %
A dynamic driver for everything below 3.6 kHz and a balanced armature above it, so cymbals stop sharing a diaphragm with the bass.
The range
Seven pairs, one battery target
Every pair reaches at least forty hours of playtime and IPX5, because a spec that only the flagship meets is a spec you cannot put in a headline. Prices are in USD and include worldwide shipping, and each card carries that model’s own campaign poster. The three speakers are further down.
Meridian
The single-ear hook headset, with the charge level printed on the shell so you know before the call, not during it. Hybrid ANC, six mics, 40 h.
Wavelet
The case is a football and the buds are panelled to match. None of which changes the 12 mm driver inside, or the 40 hours it runs for.
Court
Wavelet’s driver, Wavelet’s battery, different firmware: a game mode that pulls end-to-end latency down to 55 ms and turns the ANC into a wind-tolerant filter.
Vox 1
The everyday pair, in Signal Red. 12 mm dynamic driver, hybrid ANC to 34 dB, eight hours in the buds and thirty-two in the case. The one most people should buy.
Loop
Braided cord, adjustable sliders, and every control on one inline pod — volume, power, calls, all under a thumb and none of them needing an app.
Node
The electronics live in a triangular module that hangs where a pendant would, which is how a 40-hour cell fits on something this thin. Dual-mic with sidetone, in a Business and an Eco edition.
Ridge
Clip-on hooks that sit against the ear instead of inside it, so nothing seals and nothing works loose. ANC, Bluetooth 5.4, 40 h. In Onyx Black.
Nothing in that family yet — email us and we will tell you what is coming.
The second line
Three speakers, deliberately not thirty
Earbuds are what we do. The speakers exist because the driver work, the codec stack and the forty-hour battery rule were already paid for, and because people kept asking for something to put on a table. Three models is the whole line, and there is no fourth planned.
Cairn
20 W from one 70 mm full-range driver and two passive radiators. Floats, 620 g, IP67. The one that lives in a bag.
Column
360°, from an up-firing 80 mm driver into a dispersion cone with four radiators around the base. Stands in the middle of a table rather than at one end.
Slab
80 W of real stereo — two 90 mm woofers, two 20 mm tweeters, a steel handle and a strap. IP66 rather than IP67, because the handle mount is a hole.
- Forty hours at 50 % volume, the same rule as the earbuds. USB-C to full in three hours, and the same port will charge your phone.
- SBC, AAC and LC3, two live connections, and no app needed to do anything at all.
- Pair two of the same model for stereo, or chain up to eight of any of them together.
- No noise cancelling — it means nothing on a speaker. Cairn and Column have no microphone either, so they cannot take calls. Slab can.
How a pair gets made
Eight steps, and two of them are just measuring
Every bud is swept in a coupler and every pair is matched before it is boxed. It is the least glamorous part of the process and the reason two buds sound like one product. The speakers get steps 01, 02, 05, 07 and 08; the rest only matter to something that has to fit inside an ear.
- 01
Acoustic model
Cavity volume, port length and nozzle diameter are simulated before any tooling is cut.
- 02
Driver build
Dome, voice coil and magnet assembled, then matched into pairs to within ±1 dB.
- 03
Cavity & venting
Front and rear vents tuned so the seal does not turn into ear pressure on a long flight.
- 04
ANC calibration
Each unit swept in a coupler; the feedback filter is written per unit, not per batch.
- 05
Firmware & codec
SBC and AAC everywhere, LC3 where the hardware supports it, dual connection on every model.
- 06
Seal & leak test
Checked on a head simulator across all four tip sizes, because ANC without a seal is decoration.
- 07
Drop, sweat, water
1.2 m drops onto oak, 48 hours of salt-fog sweat, then the IPX5 jet from every direction.
- 08
Pair, pack, ship
Buds paired to their case at the line and packed with all four tip sizes in the box.
Noise control
38 dB, and an honest curve
Four of the six microphones on a pair are doing noise cancellation: two outside listening to the world, two inside listening to what leaked past the tip. The outside pair handles steady low-frequency noise, the inside pair corrects for your particular ear.
- Hybrid feedforward and feedback, calibrated per unit rather than per batch
- Transparency that passes speech through without the hiss of a raised noise floor
- Wind detection that drops the outside mics rather than roaring at you
- Nothing above 2 kHz is claimed — no earbud cancels a conversation, and we will not pretend otherwise
Measured on Meridian with the medium tip on a head simulator. Your ear is not a head simulator; a tip that seals matters more than any of these numbers.
Battery & charging
Forty hours, and here is how we counted
Eight hours in the buds plus thirty-two in the case, at 50 % volume on AAC with noise cancelling off. Turn ANC on and it is about six and thirty. We publish both because the first number is the one everybody prints and the second is the one you will live with.
- Ten minutes in the case buys roughly two hours of listening
- USB-C to full in 90 minutes; Qi wireless at 2.5 W where the model supports it
- Cells hold at least 80 % of rated capacity after 500 full cycles
- Cases and single buds are sold separately, so one dead cell is not a dead pair
- The three speakers hit the same forty hours at 50 % volume, from a much larger cell
40 hbuds plus case, ANC off
30 hthe same pair with ANC on
10 mincharge for two hours of play
500cycles to 80 % capacity
Fit, comfort, durability
The four things that decide whether you keep wearing them
None of them are on the spec sheet people compare. All of them are why a pair ends up in a drawer.
Four tip sizes, in the box
XS to L silicone, plus memory foam in medium. Fit decides bass response and it decides how much noise the ANC has to work on — shipping one tip size and calling it universal is the cheapest way to make a good driver sound wrong.
4.1 to 5.4 g per bud
Weight is where the flagship pays for its second driver. Vox 1 is 4.6 g a bud, Meridian is 12 g on one ear, and the difference is noticeable after about three hours. Both distribute load onto the concha rather than hanging off the canal.
IPX5, and what it is not
IPX5 is a 12.5 litre-per-minute jet from any angle for three minutes — sweat, rain, a rinse under the tap. It is not immersion. The three speakers are separately rated IP67 and survive 1 m for 30 minutes; nothing you wear here is a swimming earbud.
Wear detection that stays out of the way
Optical, not capacitive, so a hat or a hood does not pause your music. Take a bud out and playback stops in under half a second; put it back and it resumes without reaching for the phone.
Quality & compliance
Six rigs, and paperwork for every market we ship to
Radio equipment is regulated everywhere it lands. These are the tests a pair passes before it ships and the approvals that let it cross a border.
Coupler sweep
Every bud measured 20 Hz – 20 kHz against the model's reference curve; anything outside ±3 dB goes back.
Pair matching
Left and right matched to within ±1 dB across the band, then paired for life and boxed together.
Drop tower
1.2 m onto oak, ten faces, bud and case. The hinge and the nozzle are what break, so those get twenty.
Sweat & salt fog
48 hours of artificial perspiration at 35 °C. Sweat kills more earbuds than water does, and it kills them at the contacts.
Water ingress
An IPX5 jet at 12.5 l/min from every direction for three minutes on the wearables; the speakers add a 1 m, thirty-minute immersion for IP67. Full electrical and acoustic retest after either.
Battery cycling
500 full charge cycles at 25 °C, with capacity logged; the pass mark is 80 % of rated capacity.
- CE — RED & EMC
- UKCA
- FCC Part 15C
- ISED Canada
- Bluetooth SIG QDID
- EN 50332-2
- RoHS & REACH SVHC
- WEEE
Shipping, warranty, returns
Free worldwide shipping, and no asterisk on it
Every order ships free and tracked, wherever you are, with no minimum. What we cannot absorb is import duty and local sales tax — those are charged by your customs authority, not by us, and they are the one cost we will never be able to quote in advance.
- Tracked worldwide, dispatched within one to two working days
- Typical transit is three to eight working days, customs excepted
- Thirty days to change your mind, unworn tips and all, return shipping on us
- Twenty-four month warranty, batteries included, single buds replaced individually
$0shipping cost, every country
2 daysto dispatch, at the latest
30 daysto return, no reason needed
24 mowarranty, batteries included
Questions
Nine things people ask before they buy
Is shipping really free everywhere?
Yes. Every order ships free and tracked, wherever you are, with no minimum spend. Import duty and local sales tax are not included and are payable to your carrier or customs authority on arrival — that is a charge from your government, and no seller can waive it.
What does “40 hours” actually mean?
Eight hours in the buds plus thirty-two more in the case, measured at 50 % volume on AAC with noise cancelling off. With ANC on, expect around six hours in the buds and thirty in the case. Both figures are on this page rather than in a footnote.
How much noise does the ANC remove?
Up to 38 dB at the peak of the curve, between roughly 120 and 400 Hz — engine drone, rail rumble, air conditioning. Attenuation falls away above 1 kHz, which is why no earbud silences a conversation. The full curve is in Noise control.
Is IPX5 enough for running in the rain?
Yes. IPX5 means the buds survive a low-pressure water jet from any direction, which covers sweat and rain comfortably. It does not cover immersion, so do not swim or shower in them. The three speakers are separately rated IP67 and will survive being dropped in water.
Which codecs do you support?
SBC and AAC on everything we make, plus LC3 over Bluetooth LE Audio on Meridian, Ridge, Node and all three speakers. There is no proprietary codec here, so nothing depends on which phone you happen to own.
You make speakers too — are they the same thing in a bigger box?
Different drivers, same rules. Earbuds are the main business and the speakers are a deliberately small line of three. They run forty hours at 50 % volume like everything else, take SBC, AAC and LC3, hold two connections and need no app. They are rated IP67 rather than IPX5 — except Slab at IP66, because its handle mount is a hole. None of them has noise cancelling, and Cairn and Column have no microphone, so they cannot take calls. The three are here.
Can I connect to two devices at once?
Every model holds two active connections and switches to whichever one starts playing or takes a call. Meridian also ships with a USB-C dongle for conferencing hardware that refuses to pair with anything it did not come with.
What if I lose a bud, or the battery fades?
Single buds and cases are sold separately for every pair we have shipped, so a lost left bud does not cost you a pair. Cells hold at least 80 % of rated capacity after 500 full cycles; if yours does not, inside twenty-four months that is a warranty replacement.
How do I order?
By email, for now. Send the model, the quantity and where you want it shipped using the form below, and we reply within one working day with a payment link and a delivery estimate. A checkout is coming; until it does, this is how it works.
Talk to us
Tell us which pair, and where it is going
One working day, and a person who knows the difference between the models — not a queue number.
Emailultimocall@ultimocall.com
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ShippingFree and tracked, every country