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The S1 Circle is not just a speaker.

It's a gateway to a world of extraordinary sound — transcending the boundaries of traditional compact speakers, offering an immersive and dynamic audio experience you’d think was only possible with larger speaker systems.

It’s a journey where every note, every rhythm, and every beat comes alive with breathtaking clarity and depth.

Are you still with us?

Inspired by the 19th century Helmholtz resonator — the S1 Circle’s spherical design is a testament to the enduring brilliance of scientific innovation. 

Capable of delivering a soundstage that fills the room, and changing what you thought was possible from a compact portable speaker.

Are you ready to embark on this extraordinary adventure?




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It’s time to end the era of portable speakers that can’t reproduce audio the way it was intended. With S1 Circle you’ll hear every tone, every note, and every beat with exceptional clarity and precision.

Meanwhile, strategic positioning of its drivers, passive radiators, and woofers create a soundscape that surrounds you from all directions.

You know that moment when music starts playing and goosebumps instantly appear across your skin? Yeah. Brace yourself.




Imagine a soundscape that is more immersive and powerful than ever before. The S1 Circle takes your audio experience to a whole new level thanks to its 360-degree sound core that fills every corner of the room. 

With 4 drivers placed strategically in symmetrical positions and 2 passive radiators, the S1 Circle balances pressure and harmonizes sound amplitude like a champ, for crystal clear, immersive audio.

Don't settle for mediocre bass. The S1 Circle packs a serious punch when it comes to delivering a deep, implosive bass performance that will shake the party like no other. 

With dual 2.5" woofers and dual passive radiators working in perfect harmony, this bad boy generates a bass response that’s incredibly powerful and distortion-free — even at max volumes.

Your neighbors might not like this one, but you and your guests definitely will.

Nothing’s worse than running out of juice in your speakers halfway through the party. S1 Circle delivers a whopping 20-hours of battery life on a single charge, so the party can go on from dusk till dawn and beyond…

… and you can finally stop checking up on the charge level every hour.

How about that for a small portable speaker?

Oh, there’s more…

With support for TWS (True Wireless Stereo), you can pair 2 UB+ speakers together for a powerful stereo experience — perfect for use under your TV, alongside your computer monitor, or to step your barbeque party up a notch — the sky's the limit!

Want even more listening power? Connect up to 8 S1 speakers in Matrix Mode and blast your music simultaneously from 8 different locations.

Your music has never sounded so grand, so immersive, and so incredibly alive.

1. Open the UB+ Seek smartphone app
2. Turn on both speakers
3. Select the speakers
4. Tap the TWS button.

And that’s it — hit play and let the magic happen.

 

When you’ve got a carefully designed home, the last thing you want is a speaker system ruining the aesthetic.

Featuring a soft fabric design in a range of colors, the S1 Circle elegantly blends in with your furniture — whether you place it on your TV stand, besides your sofa, or on a bookshelf.

It’s not just a speaker. It’s a statement piece that enhances the ambiance of your living space.


How are you going to carry a spherical speaker around, you ask? 
With a stylish and functional premium cowhide leather strap, we say!

Included in the package, the strap can be attached to the S1 Circle and secured in place with a stainless steel knob.
Now you can effortlessly tote your speaker from place to place, whether it's room to room or into the great outdoors! And, if you're feeling extra fancy, you can even hang it up on hooks or knobs.

Achieving a powerful sound from a speaker this small doesn’t happen out of the blue. We carefully selected the best combination of components for the job, and strategically placed them within a bass reflex system to achieve powerful implosive bass.

Dual 2.5” woofers

For the dual 2.5” (64mm) woofers, we opted for a 25.8mm (1”) copper-clad aluminum ribbon voice coil that provides a smooth and extended response — and coupled it with a neodymium magnet to propel the cone to move 20mm (0.8”) in a truly pistonic fashion.

Dual Passive Radiators

Passive radiators line up the front and back of the sphere, and help generate deep, resonant low frequencies. 

Dual 28mm Tweeters

And then you’ve got the large dual 28mm (1.1”) silk single-dome tweeters — working in balance with the woofers to provide that oh-so satisfying clean and dynamic audio that’s perfect for all styles of music.
This might not be the loudest speaker of its size, but it sure as hell is the most powerful.

Bluetooth 5.3 LE

Consider connectivity drops, laggy playback, and scrambled audio a thing of the past. 

The S1 Circle uses Bluetooth 5.3 LE (Low Energy) to connect to your devices, which not only provides a robust and reliable connection but also optimizes power consumption, allowing you to enjoy your music for longer periods without draining your device's battery.

Built-in Microphone

The S1 Circle is equipped with a built-in microphone, making it perfect for hands-free calls and conference calls. It also features advanced noise cancellation technology, so your voice is crystal clear — even in noisy environments.

UB+ Smartphone App

The UB+ Smartphone App allows you to unlock the full potential of your S1 speaker and gives total control at your fingertips. Design custom profiles for each device, toggle between devices instantly, and use the equalizer to craft a unique listening experience tailored just for you. Simply drag the sliders until it's perfect, sit back… and enjoy!