Elegant and powerful, our BXT turns any pair of Kii THREE into unrivaled floor-standing speakers.

• Wired Connectivity
• Floor Standing Full Range Speaker
• 3,500 Watts of Immersive Sonic Clarity per Speaker

• Ideally Suited for Both Home Audio and Professional Studios
• Available in Twelve Premium Colors

Your Favorite Speaker — Now With Superpowers

If the Kii THREE is already incredible, the BXT takes it to extraordinary. Adding eight extra woofers per side in a perfectly matched base, the BXT transforms the THREE into a full-range floorstanding powerhouse — with bass you can feel and control you can hear. Thanks to its line-source effect, it delivers cleaner, more consistent bass by minimizing reflections from your floor and ceiling, and because it shares the same footprint as the THREE, it’s a no-compromise upgrade for style and space.

Smarter Bass, Better Sound Everywhere

True modular design means the BXT can be added anytime without replacing your Kii THREE. Mechanical and electrical integration is quick, tool-free, and fully phase-coherent. The seamless DSP integration ensures the combined system feels like one purpose-built loudspeaker, delivering massive headroom — over 7,000 watts per stereo pair — for effortless dynamics at any level.

For the Room — and the Life — You Want

Whether it’s an expansive living space, a dedicated home theater, or simply the thrill of live performance at home, the THREE/BXT system delivers not just volume, but presence, finesse, and the kind of emotional connection that keeps you listening longer.

At Home In Any Room

Hidden behind the beauty of the Kii THREE is a fantastic speaker that is small enough to fit easily into modern living spaces. It doesn’t take over your habitat like a huge old audiophile setup; there are no racks, no big towers, no cables to trip over. Instead, there’s intelligence! The clarity and detail, the impressive time coherence, and, most importantly, the handling of room acoustics let the listener dive right into the magical experience of an excellent record, more so than even the best conventional setups can.

All the innovations inside this speaker serve a single purpose: to be more true to the music. Kii brings more music into your life. Let’s face it: buying a second system for daily use because the “big” system is too impractical for background listening was never a solution. Even the best Hi-Fi set should be easy and intuitive to use for anyone in the house. Whenever there’s music on your mind, there should be great music in your home.

The BXT is an extension module that turns the Kii THREE into a veritable floor-standing loudspeaker with 16 additional drivers. The Kii THREE BXT System is absolutely unique as it combines a line source with horizontal directivity control! The BXT makes full use of the Kii THREEs technology, adding a wider frequency range and increased SPL to the game while still being a cardioid system that, despite its size, does not interact with the room. Astoundingly enough, small rooms benefit significantly from the line source concept.

the Kii Difference

What Makes Kii Audio Truly Unique

Founded in 2015 by acclaimed audio engineer Bruno Putzeys, Kii Audio has quickly become renowned for tackling long-standing challenges in speaker design. At its core lies a revolutionary Active Wave Focusing technology, which employs DSP-driven cardioid dispersion. This innovation allows compact speakers, like the Kii SEVEN, to deliver sound with grand-system clarity while minimizing unwanted room reflections—dramatically enhancing timing, bass precision, and spatial fidelity. What’s more, each Kii THREE BXT packs 3500 watts of Class D amplification across fourteen drivers (front, side, and back), achieving a level of performance and detail often associated with much larger systems.

A Legacy of Innovation:

Disruption and Decades-Long Innovation

Kii Audio is widely seen as a disruptive force in a traditionally conservative audio market. As noted by What Hi‑Fi?, “True innovation seems to be a rare quality in speaker design… But not at Kii.” Their approach not only overcomes typical acoustic compromises but also introduces entirely new paradigms for directivity and listener experience. With a steadfast commitment since 2015 to advancing both hardware and software—encompassing compact cardioid speakers and the newly unveiled Kii Seven wireless music system, complete with multi‑room smart control—the company demonstrates a decade‑long dedication to innovation and pushing boundaries.

Between their bold engineering breakthroughs, professional-grade performance in a refined form, and long-term devotion to innovation, Kii Audio stands out as a genuinely transformative presence in the audio landscape.