Elegant and powerful, our BXT turns any pair of Kii THREE into unrivaled floor-standing Cardioid Line Source Monitors.
The THREE/BXT system is a studio-grade full-range reference that brings main-monitor scale to any space — without sacrificing precision. Sixteen additional woofers form a vertical line array that shapes and controls the low end, focusing energy where it counts and minimizing floor and ceiling reflections. With over 7,000 watts per stereo pair, you get massive headroom, unshakable control, and the authority to work confidently on any project.
The BXT integrates seamlessly with the THREE, sharing the same DSP brain for perfect time alignment and phase coherence. The cardioid dispersion from the THREE combines with the BXT’s line array effect to deliver bass that’s as accurate as it is powerful, even in challenging acoustic environments.
From mastering orchestral recordings to producing bass-driven electronic tracks, the THREE/BXT gives you a full-bandwidth, high-SPL monitoring solution with zero compromise on detail or accuracy. It’s the clarity and control you need to make decisions fast — and know they’ll hold up anywhere.
| TECHNICAL SPECIFICATION |
| System Type | Floor standing DSP controlled High-End playback system |
|---|---|
| Includes | 2 × Kii THREE speakers |
| Includes | 2 × BXT modules |
| Kii Control | Volume control, input selection (touch), software menu, OLED display, IR ready |
|---|---|
| Inputs | USB, SPDIF, TOSLINK, AES, ANALOGUE |
| Cables | All necessary cables are included |
| TECHNICAL SPECIFICATION: |
| System Type | Full-size floorstanding DSP controlled monitor speaker system |
|---|---|
| Woofer | 12 × 6.5” |
| Midrange | 1 × 5” |
| Waveguided Tweeter | 1 × 1” |
| Amplification | 2.000 Watt full custom Class D |
| Active Wave Focusing Crossover Filter | |
| Frequency Response | -3dB: 20Hz, 100Hz–10kHz: ±0.5dB, 10kHz–20kHz: ±1dB |
| Integrated Tone Control | Selectable correction for free-standing, near wall or in corner (14 positions) |
|---|---|
| Phase Response | Selectable, linear phase or minimum latency |
| Protection Limiters | |
| Controlled Directivity | 4.8dB (54Hz – 1kHz, slowly rising thereafter) |
| Size | 20×120×40cm, 8”×47”×16” (WxHxD) |
| Weight | 51kg (112lbs) |
| Inputs | Analogue, AES/EBU, KiiLink; SPDIF, TOSLink, USB on Kii Control |
| Selectable correction for free-standing, near wall or in corner (14 positions) |
| Automatic Standby Mode |
| (*) IEC60268-5 Paragraph 20.6 |
• FModular bass extension for Kii THREE
• True modular design — add anytime, no
replacement needed
• Same footprint as Kii THREE
• 8 × woofers per BXT, Class D powered
amplification
• Additional 4 × 500 W amps per BXT
• Line-source vertical dispersion control for
low/mid frequencies
• Seamless DSP integration and phase
coherence
• Massive headroom: over 7,000 W per stereo
pair
• Extended bass <20 Hz (-6 dB)
• 1200 × 200 × 400 mm per side
• Connectivity as per Kii THREE + integrated
BXT link
The Kii CONTROL turns the Kii THREE into a complete playback system of highest sonic quality and usability. It offers a user interface for your speakers and works like a digital preamplifier.
Only connect your analog source, CD player/drive, server, streamer, TV set or set top box to enjoy a breathtakingly audiophile full range system in a stunningly small footprint.
The Kii CONTROL offers three additional digital inputs for the Kii THREE: Coax SPDIF, Optical TOSLINK and USB (up to LPCM 24/384kHz or DSD64/128 on USB).
All inputs are located on the backside connector panel and can be activated with the touch buttons located around the volume knob. A dedicated input button (labeled XLR) will switch to the existing hardware input on the speaker itself, which you can continue to use as analog or digital input. The Kii Control connects with a single included CAT6 cable and is also powered through this connection. No additional power supply is necessary. Most importantly the Kii CONTROL enables lossless volume control inside the DSP of the Kii THREEs, keeping the signal path of the system as transparent as possible. The big volume knob also offers mute or dim functions and manual power on/off (standby). A dedicated touch button provides direct access to up to six user definable presets. The menu navigation and OLED display vastly expand the options of the Boundary and Contour settings, while also providing access to more advanced system settings, including amongst others for example manual power on/standby, LED brightness, DIM function and limiter indication. The main functions like volume, source and mute can be remote controlled via your IR Remote (RC5 type or Apple Remote).
Only connect your analog source, CD player/drive, server, streamer, TV set or set top box to enjoy a breathtakingly audiophile full range system in a stunningly small footprint.
The Kii CONTROL offers three additional digital inputs for the Kii THREE: Coax SPDIF, Optical TOSLINK and USB (up to LPCM 24/384kHz or DSD64/128 on USB).
Ultra compact controller/preamp/USB Interface for Kii THREE Loudspeaker.
Additional Audio Inputs:
KiiLink Output: Power and Data Connection to Kii THREE Master speaker
Capacitive Touch Buttons:
New features in Kii Control firmware v.2.4:
Size: 11cm x 5cm x 16cm (W x H x L)
Weight: 380g
(We have tested the USB input with streamers and servers from INNUOS, Melco, Lumin,
Aurender and Auralic with excellent results.)
| Woofer | 2 x 6.5” |
|---|---|
| Midrange | 1 x 5” |
| Tweeter | 1 x 1” Custom wave-guided |
| Amplification | 600 watt |
| Active Wave Focusing Crossover Filter | Cardioid dispersion to eliminate problematic room acoustics. |
| Frequency Response | -3dB: 40Hz, 100Hz–10kHz: +/- 0.5dB, 10kHz–20kHz: +/- 1dB |
| Integrated Tone Control | Adjust bass and treble levels to match your listening taste. |
| Phase Response | Minimum phase or minimum latency |
| Driver Protection Limiters | Keeping the drive units within their optimal operating range and damage-free. |
| Inputs | XLR and TRS, AES/EBU, KiiLink/KiiCONTROL, WiFi, Bluetooth, DANTE |
| Colors | Fine Touch White, Fine Touch Dark Grey |
| Size and Weight | 20×31×31cm, 8”×12,2”×12,2” (WxHxD), 14kg (30lbs) |
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.
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.
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.
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Demo and Tradeshow listening opportunities will be evolving quickly.
Bluetooth is a wireless communication protocol that allows to stream music directly from mobile devices like phones or tablets.
Hi-Res Audio, short for High-Resolution Audio, refers to digital audio formats and equipment that provide higher sound quality and fidelity than standard audio formats like MP3 or CD audio. Hi-Res Audio aims to reproduce audio with greater precision, capturing more detail and nuances from the original recording, resulting in a more immersive and lifelike listening experience.
“Roon Tested” is a designation Roon Labs gives audio devices verified to work well with Roon software. Unlike “Roon Ready” devices, which are typically network-enabled and can directly interface with Roon’s core server, “Roon Tested” devices may not have network capabilities but have been tested to ensure they perform optimally when connected to a Roon system, typically through USB, HDMI, AirPlay, Google Cast, or other connections.
STANDARD COLORS
PREMIUM COLORS
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Demo and Tradeshow listening opportunities will be evolving quickly.
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FIDELITY Kii THREE BXT System Review 01/2020 – German
FIDELITY Kii THREE BXT System Review 01/2020 – English
Studio Magazin – Oktober 2022 – GERMAN
Kii THREE BXT System – HiFi News April 2020 – EN
HiFi News OUTSTANDING PRODUCT – December 2020 – Kii THREE BXT System – EN
2026 Kii SEVEN – Giveaway!
ENTRY LIMIT. Limit one (1) entry per natural person, one (1) entry per household (people sharing the same residential address), and one (1) entry per place of business (people sharing the same business/office address) during the Promotion Period, regardless of method of entry. Entries in excess of these limits, or entries submitted using multiple identities, accounts, email addresses, devices, scripts, or automated processes, are void and may result in disqualification of all associated entries, in Sponsor’s sole discretion.
DISPUTE OF IDENTITY. If there is a dispute as to the identity of an entrant, the entrant will be deemed the authorized account holder of the email address used to enter. Winner selection language (random draw February 12, 2026).
DRAWING DATE / RANDOM SELECTION. One (1) potential winner will be selected in a random drawing from all eligible entries received. The drawing will occur on February 12, 2026. Odds of winning depend on the total number of eligible entries received.
NOTIFICATION / VERIFICATION. The potential winner will be notified by email and may be required to complete and return an Affidavit/Declaration of Eligibility, Liability/Publicity Release(where lawful), and any required tax forms within the time stated in the notification. If a potential winner cannot be contacted, does not respond in time (2 calendar days), is found ineligible, or fails to complete required documents, the prize may be forfeited, and an alternate winner may be selected.
TAXES (U.S.). The winner is solely responsible for any federal, state, and local taxes and any expenses not explicitly stated as included. For U.S. winners, Sponsor may issue an IRS Form 1099-MISC for the fair market value of the prize as required by law. For non-U.S. winners, Sponsor may withhold taxes and report the prize on applicable IRS forms, as required.
CALIFORNIA NOTICE. California residents may be required to report the fair market value of the prize as income on their California personal income tax return.
Qobuz Connect is known for its high-quality music streaming, including support for lossless and Hi-Res Audio. The software enhances the listening experience by allowing users to stream music to compatible audio devices and speakers easily.
